Literature DB >> 21583907

(E)-3-[4-(Dec-yloxy)phen-yl]-1-(4-hydroxy-phen-yl)prop-2-en-1-one.

Ibrahim Abdul Razak, Hoong-Kun Fun, Zainab Ngaini, Norashikin Irdawaty Abd Rahman, Hasnain Hussain.   

Abstract

In the title compound, C(25)H(32)O(3), the enone group adopts an s-cis conformation. The alk-oxy unit is nearly planar and is in a trans conformation. The two benzene rings make a dihedral angle of 18.87 (9)°. In the crystal structure, mol-ecules are linked into chains running along the a axis by inter-molecular O-H⋯O hydrogen bonds involving the hydr-oxy and keto groups. The chains are crosslinked along the b axis via C-H⋯O hydrogen bonds, forming a two-dimensional network parallel to the ab plane.

Entities:  

Year:  2009        PMID: 21583907      PMCID: PMC2977771          DOI: 10.1107/S160053680901441X

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For the biological properties of chalcone derivatives, see: Bhat et al. (2005 ▶); Xue et al. (2004 ▶); Satyanarayana et al. (2004 ▶); Lee et al. (2006 ▶). For related structures, see: Ng et al. (2006 ▶); Razak et al. (2009 ▶); Ngaini, Fadzillah et al. (2009 ▶); Ngaini, Rahman et al. (2009 ▶). For bond-length data, see: Allen et al. (1987 ▶). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986 ▶).

Experimental

Crystal data

C25H32O3 M = 380.51 Orthorhombic, a = 10.5192 (3) Å b = 9.9839 (3) Å c = 40.8415 (12) Å V = 4289.3 (2) Å3 Z = 8 Mo Kα radiation μ = 0.08 mm−1 T = 100 K 0.58 × 0.49 × 0.03 mm

Data collection

Bruker APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2005 ▶) T min = 0.957, T max = 0.998 42832 measured reflections 4922 independent reflections 3526 reflections with I > 2σ(I) R int = 0.082

Refinement

R[F 2 > 2σ(F 2)] = 0.064 wR(F 2) = 0.132 S = 1.10 4922 reflections 258 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.20 e Å−3 Δρmin = −0.22 e Å−3 Data collection: APEX2 (Bruker, 2005 ▶); cell refinement: SAINT (Bruker, 2005 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009 ▶). Crystal structure: contains datablocks global, I. DOI: 10.1107/S160053680901441X/ci2782sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S160053680901441X/ci2782Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C25H32O3F(000) = 1648
Mr = 380.51Dx = 1.178 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 4176 reflections
a = 10.5192 (3) Åθ = 2.2–23.9°
b = 9.9839 (3) ŵ = 0.08 mm1
c = 40.8415 (12) ÅT = 100 K
V = 4289.3 (2) Å3Plate, colourless
Z = 80.58 × 0.49 × 0.03 mm
Bruker APEXII CCD area-detector diffractometer4922 independent reflections
Radiation source: sealed tube3526 reflections with I > 2σ(I)
graphiteRint = 0.082
π and ω scansθmax = 27.5°, θmin = 1.0°
Absorption correction: multi-scan (SADABS; Bruker, 2005)h = −13→13
Tmin = 0.957, Tmax = 0.998k = −12→12
42832 measured reflectionsl = −53→52
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.064Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.132H atoms treated by a mixture of independent and constrained refinement
S = 1.10w = 1/[σ2(Fo2) + (0.0368P)2 + 2.6345P] where P = (Fo2 + 2Fc2)/3
4922 reflections(Δ/σ)max = 0.001
258 parametersΔρmax = 0.20 e Å3
0 restraintsΔρmin = −0.22 e Å3
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K.
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
xyzUiso*/Ueq
O10.97999 (14)0.70636 (15)0.20018 (3)0.0232 (3)
O20.66825 (13)0.56794 (14)0.32684 (3)0.0228 (3)
O30.93786 (13)−0.03516 (14)0.45190 (3)0.0227 (3)
C10.79176 (18)0.6934 (2)0.27426 (5)0.0213 (4)
H10.72420.73970.28360.026*
C20.83983 (19)0.7353 (2)0.24449 (5)0.0220 (4)
H20.80510.80960.23400.026*
C30.94058 (19)0.6659 (2)0.23015 (5)0.0198 (4)
C40.9958 (2)0.5589 (2)0.24676 (5)0.0224 (4)
H41.06550.51490.23780.027*
C50.94723 (18)0.5179 (2)0.27665 (5)0.0219 (4)
H50.98470.44630.28750.026*
C60.84262 (18)0.5826 (2)0.29070 (4)0.0193 (4)
C70.77760 (18)0.5307 (2)0.32020 (4)0.0189 (4)
C80.84031 (19)0.4306 (2)0.34137 (4)0.0206 (4)
H80.92480.40780.33770.025*
C90.77621 (19)0.3725 (2)0.36590 (4)0.0204 (4)
H90.69320.40180.36900.024*
C100.82043 (18)0.2687 (2)0.38841 (4)0.0204 (4)
C110.94097 (18)0.2090 (2)0.38649 (5)0.0216 (4)
H110.99810.23780.37060.026*
C120.97590 (19)0.1086 (2)0.40773 (5)0.0222 (5)
H121.05600.06980.40590.027*
C130.89207 (19)0.0645 (2)0.43198 (4)0.0201 (4)
C140.77209 (18)0.1205 (2)0.43435 (5)0.0213 (4)
H140.71530.09140.45030.026*
C150.73770 (19)0.2212 (2)0.41247 (4)0.0223 (4)
H150.65670.25810.41390.027*
C160.85615 (19)−0.0838 (2)0.47766 (5)0.0223 (5)
H16A0.7759−0.11410.46860.027*
H16B0.8391−0.01300.49330.027*
C170.92412 (19)−0.1985 (2)0.49413 (5)0.0226 (5)
H17A1.0055−0.16740.50230.027*
H17B0.9403−0.26840.47820.027*
C180.84727 (19)−0.2561 (2)0.52231 (5)0.0241 (5)
H18A0.7647−0.28370.51420.029*
H18B0.8337−0.18670.53860.029*
C190.91156 (19)−0.3754 (2)0.53860 (5)0.0245 (5)
H19A0.9968−0.34960.54510.029*
H19B0.9190−0.44720.52270.029*
C200.84121 (19)−0.4277 (2)0.56855 (5)0.0246 (5)
H20A0.8313−0.35520.58420.030*
H20B0.7569−0.45650.56200.030*
C210.9087 (2)−0.5439 (2)0.58526 (5)0.0260 (5)
H21A0.9129−0.61870.57010.031*
H21B0.9951−0.51720.59030.031*
C220.8444 (2)−0.5903 (2)0.61656 (5)0.0282 (5)
H22A0.8427−0.51610.63190.034*
H22B0.7570−0.61360.61160.034*
C230.90728 (19)−0.7093 (2)0.63310 (5)0.0266 (5)
H23A0.9130−0.78230.61750.032*
H23B0.9932−0.68460.63930.032*
C240.8373 (2)−0.7579 (2)0.66318 (5)0.0347 (6)
H24A0.7505−0.77990.65720.042*
H24B0.8342−0.68610.67920.042*
C250.8993 (2)−0.8805 (3)0.67877 (6)0.0446 (7)
H25A0.8492−0.90950.69710.067*
H25B0.9833−0.85770.68610.067*
H25C0.9043−0.95130.66290.067*
H1O11.046 (3)0.654 (3)0.1909 (7)0.078 (10)*
U11U22U33U12U13U23
O10.0271 (8)0.0216 (8)0.0209 (7)0.0019 (7)0.0033 (6)0.0032 (6)
O20.0224 (7)0.0248 (8)0.0213 (7)0.0034 (7)0.0014 (6)0.0005 (6)
O30.0228 (7)0.0231 (8)0.0222 (7)0.0004 (6)0.0017 (6)0.0052 (6)
C10.0207 (10)0.0187 (11)0.0245 (10)0.0008 (9)0.0005 (8)−0.0032 (9)
C20.0230 (10)0.0175 (11)0.0255 (11)0.0006 (9)0.0002 (8)0.0024 (9)
C30.0239 (10)0.0159 (11)0.0195 (10)−0.0047 (9)−0.0001 (8)0.0004 (8)
C40.0239 (10)0.0195 (11)0.0237 (10)0.0032 (9)0.0025 (8)−0.0016 (9)
C50.0235 (10)0.0186 (11)0.0236 (10)0.0005 (9)−0.0006 (8)0.0010 (9)
C60.0212 (10)0.0169 (11)0.0198 (10)−0.0021 (9)−0.0010 (8)−0.0018 (8)
C70.0226 (10)0.0152 (10)0.0190 (10)−0.0001 (9)−0.0018 (8)−0.0048 (8)
C80.0203 (10)0.0213 (11)0.0203 (10)0.0004 (9)−0.0006 (8)−0.0017 (8)
C90.0228 (10)0.0205 (11)0.0178 (10)−0.0004 (9)−0.0012 (8)−0.0029 (8)
C100.0231 (10)0.0208 (11)0.0171 (9)−0.0012 (9)−0.0002 (8)−0.0028 (8)
C110.0222 (10)0.0246 (12)0.0178 (10)−0.0032 (9)0.0008 (8)0.0019 (9)
C120.0187 (10)0.0265 (12)0.0215 (10)0.0000 (9)0.0002 (8)−0.0016 (9)
C130.0238 (10)0.0187 (11)0.0179 (9)−0.0012 (9)−0.0023 (8)0.0002 (8)
C140.0223 (10)0.0199 (11)0.0216 (10)−0.0029 (9)0.0038 (8)0.0011 (9)
C150.0213 (10)0.0235 (12)0.0221 (10)0.0021 (9)0.0005 (8)−0.0017 (9)
C160.0249 (10)0.0212 (11)0.0207 (10)−0.0017 (9)0.0021 (8)0.0030 (8)
C170.0224 (10)0.0209 (11)0.0245 (10)−0.0031 (9)−0.0022 (8)−0.0002 (9)
C180.0260 (10)0.0233 (12)0.0230 (10)−0.0006 (10)−0.0015 (8)0.0036 (9)
C190.0279 (11)0.0223 (12)0.0234 (10)0.0014 (10)0.0018 (9)0.0011 (9)
C200.0249 (11)0.0235 (12)0.0255 (11)−0.0018 (10)−0.0006 (9)0.0032 (9)
C210.0272 (11)0.0249 (12)0.0261 (11)0.0006 (10)0.0009 (9)0.0037 (9)
C220.0261 (11)0.0269 (12)0.0315 (12)0.0029 (10)0.0007 (9)0.0071 (10)
C230.0260 (11)0.0270 (12)0.0268 (11)0.0001 (10)0.0005 (9)0.0046 (9)
C240.0357 (13)0.0337 (14)0.0346 (12)0.0097 (12)0.0066 (10)0.0125 (10)
C250.0445 (15)0.0485 (17)0.0408 (14)0.0177 (13)0.0110 (12)0.0201 (13)
O1—C31.354 (2)C16—C171.508 (3)
O1—H1O10.94 (3)C16—H16A0.97
O2—C71.239 (2)C16—H16B0.97
O3—C131.373 (2)C17—C181.520 (3)
O3—C161.443 (2)C17—H17A0.97
C1—C21.382 (3)C17—H17B0.97
C1—C61.400 (3)C18—C191.522 (3)
C1—H10.93C18—H18A0.97
C2—C31.395 (3)C18—H18B0.97
C2—H20.93C19—C201.522 (3)
C3—C41.392 (3)C19—H19A0.97
C4—C51.385 (3)C19—H19B0.97
C4—H40.93C20—C211.522 (3)
C5—C61.399 (3)C20—H20A0.97
C5—H50.93C20—H20B0.97
C6—C71.479 (3)C21—C221.518 (3)
C7—C81.477 (3)C21—H21A0.97
C8—C91.340 (3)C21—H21B0.97
C8—H80.93C22—C231.518 (3)
C9—C101.461 (3)C22—H22A0.97
C9—H90.93C22—H22B0.97
C10—C151.396 (3)C23—C241.513 (3)
C10—C111.403 (3)C23—H23A0.97
C11—C121.376 (3)C23—H23B0.97
C11—H110.93C24—C251.526 (3)
C12—C131.397 (3)C24—H24A0.97
C12—H120.93C24—H24B0.97
C13—C141.384 (3)C25—H25A0.96
C14—C151.393 (3)C25—H25B0.96
C14—H140.93C25—H25C0.96
C15—H150.93
C3—O1—H1O1115.1 (18)C16—C17—H17A109.2
C13—O3—C16117.84 (15)C18—C17—H17A109.2
C2—C1—C6121.44 (19)C16—C17—H17B109.2
C2—C1—H1119.3C18—C17—H17B109.2
C6—C1—H1119.3H17A—C17—H17B107.9
C1—C2—C3119.77 (19)C17—C18—C19113.01 (17)
C1—C2—H2120.1C17—C18—H18A109.0
C3—C2—H2120.1C19—C18—H18A109.0
O1—C3—C4122.77 (18)C17—C18—H18B109.0
O1—C3—C2117.63 (18)C19—C18—H18B109.0
C4—C3—C2119.60 (18)H18A—C18—H18B107.8
C5—C4—C3120.12 (19)C18—C19—C20113.81 (17)
C5—C4—H4119.9C18—C19—H19A108.8
C3—C4—H4119.9C20—C19—H19A108.8
C4—C5—C6121.03 (19)C18—C19—H19B108.8
C4—C5—H5119.5C20—C19—H19B108.8
C6—C5—H5119.5H19A—C19—H19B107.7
C5—C6—C1117.92 (18)C21—C20—C19113.30 (17)
C5—C6—C7122.43 (18)C21—C20—H20A108.9
C1—C6—C7119.38 (17)C19—C20—H20A108.9
O2—C7—C8119.34 (17)C21—C20—H20B108.9
O2—C7—C6120.14 (18)C19—C20—H20B108.9
C8—C7—C6120.48 (17)H20A—C20—H20B107.7
C9—C8—C7120.40 (18)C22—C21—C20113.74 (17)
C9—C8—H8119.8C22—C21—H21A108.8
C7—C8—H8119.8C20—C21—H21A108.8
C8—C9—C10128.13 (19)C22—C21—H21B108.8
C8—C9—H9115.9C20—C21—H21B108.8
C10—C9—H9115.9H21A—C21—H21B107.7
C15—C10—C11117.26 (18)C23—C22—C21114.78 (17)
C15—C10—C9119.05 (18)C23—C22—H22A108.6
C11—C10—C9123.63 (18)C21—C22—H22A108.6
C12—C11—C10121.05 (18)C23—C22—H22B108.6
C12—C11—H11119.5C21—C22—H22B108.6
C10—C11—H11119.5H22A—C22—H22B107.5
C11—C12—C13120.53 (19)C24—C23—C22113.59 (18)
C11—C12—H12119.7C24—C23—H23A108.8
C13—C12—H12119.7C22—C23—H23A108.8
O3—C13—C14124.86 (17)C24—C23—H23B108.8
O3—C13—C12115.28 (17)C22—C23—H23B108.8
C14—C13—C12119.86 (18)H23A—C23—H23B107.7
C13—C14—C15118.92 (18)C23—C24—C25112.84 (19)
C13—C14—H14120.5C23—C24—H24A109.0
C15—C14—H14120.5C25—C24—H24A109.0
C14—C15—C10122.36 (19)C23—C24—H24B109.0
C14—C15—H15118.8C25—C24—H24B109.0
C10—C15—H15118.8H24A—C24—H24B107.8
O3—C16—C17107.35 (15)C24—C25—H25A109.5
O3—C16—H16A110.2C24—C25—H25B109.5
C17—C16—H16A110.2H25A—C25—H25B109.5
O3—C16—H16B110.2C24—C25—H25C109.5
C17—C16—H16B110.2H25A—C25—H25C109.5
H16A—C16—H16B108.5H25B—C25—H25C109.5
C16—C17—C18111.91 (17)
C6—C1—C2—C30.5 (3)C9—C10—C11—C12−177.86 (19)
C1—C2—C3—O1176.56 (18)C10—C11—C12—C13−0.6 (3)
C1—C2—C3—C4−3.1 (3)C16—O3—C13—C14−1.2 (3)
O1—C3—C4—C5−176.75 (18)C16—O3—C13—C12179.30 (17)
C2—C3—C4—C52.9 (3)C11—C12—C13—O3−179.39 (17)
C3—C4—C5—C6−0.1 (3)C11—C12—C13—C141.1 (3)
C4—C5—C6—C1−2.5 (3)O3—C13—C14—C15−179.93 (18)
C4—C5—C6—C7171.60 (18)C12—C13—C14—C15−0.5 (3)
C2—C1—C6—C52.3 (3)C13—C14—C15—C10−0.7 (3)
C2—C1—C6—C7−171.99 (18)C11—C10—C15—C141.2 (3)
C5—C6—C7—O2−160.79 (19)C9—C10—C15—C14178.62 (19)
C1—C6—C7—O213.2 (3)C13—O3—C16—C17175.86 (16)
C5—C6—C7—C817.0 (3)O3—C16—C17—C18178.90 (16)
C1—C6—C7—C8−168.94 (18)C16—C17—C18—C19177.92 (17)
O2—C7—C8—C95.4 (3)C17—C18—C19—C20175.44 (17)
C6—C7—C8—C9−172.41 (18)C18—C19—C20—C21−178.11 (18)
C7—C8—C9—C10177.52 (18)C19—C20—C21—C22175.79 (18)
C8—C9—C10—C15−179.9 (2)C20—C21—C22—C23177.99 (18)
C8—C9—C10—C11−2.7 (3)C21—C22—C23—C24−176.90 (19)
C15—C10—C11—C12−0.6 (3)C22—C23—C24—C25178.0 (2)
D—H···AD—HH···AD···AD—H···A
O1—H1O1···O2i0.95 (3)1.71 (3)2.655 (2)177 (3)
C5—H5···O1ii0.932.483.340 (2)155
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
O1—H1O1⋯O2i0.95 (3)1.71 (3)2.655 (2)177 (3)
C5—H5⋯O1ii0.932.483.340 (2)155

Symmetry codes: (i) ; (ii) .

  9 in total

1.  3D QSAR studies on antimalarial alkoxylated and hydroxylated chalcones by CoMFA and CoMSIA.

Authors:  C X Xue; S Y Cui; M C Liu; Z D Hu; B T Fan
Journal:  Eur J Med Chem       Date:  2004-09       Impact factor: 6.514

2.  Synthesis and biological evaluation of chalcones and their derived pyrazoles as potential cytotoxic agents.

Authors:  B A Bhat; K L Dhar; S C Puri; A K Saxena; M Shanmugavel; G N Qazi
Journal:  Bioorg Med Chem Lett       Date:  2005-06-15       Impact factor: 2.823

3.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

4.  Anti-angiogenic and anti-tumor activities of 2'-hydroxy-4'-methoxychalcone.

Authors:  Yeon Sil Lee; Soon Sung Lim; Kuk Hyun Shin; Yeong Shik Kim; Kazuo Ohuchi; Sang Hoon Jung
Journal:  Biol Pharm Bull       Date:  2006-05       Impact factor: 2.233

5.  (E)-3-(4-Decyl-oxyphen-yl)-1-(2-hydroxy-phen-yl)prop-2-en-1-one.

Authors:  Zainab Ngaini; Norashikin Irdawaty Abd Rahman; Hasnain Hussain; Ibrahim Abdul Razak; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-03-28

6.  Synthesis and antihyperglycemic activity of chalcone based aryloxypropanolamines.

Authors:  M Satyanarayana; Priti Tiwari; Brajendra K Tripathi; A K Srivastava; Ram Pratap
Journal:  Bioorg Med Chem       Date:  2004-03-01       Impact factor: 3.641

7.  (E)-3-(4-Hexyl-oxyphen-yl)-1-(3-hydroxy-phen-yl)prop-2-en-one.

Authors:  Zainab Ngaini; Siti Muhaini Haris Fadzillah; Norashikin Irdawaty Abd Rahman; Hasnain Hussain; Ibrahim Abdul Razak; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-03-28

8.  (E)-1-(4-Decyl-oxyphen-yl)-3-(4-hydroxy-phen-yl)prop-2-en-1-one.

Authors:  Ibrahim Abdul Razak; Hoong-Kun Fun; Zainab Ngaini; Siti Muhaini Haris Fadzillah; Hasnain Hussain
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-03-28

9.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
  9 in total
  4 in total

1.  (E)-3-[4-(Hex-yloxy)phen-yl]-1-(2-hydroxy-phen-yl)prop-2-en-1-one.

Authors:  Zainab Ngaini; Siti Muhaini Haris Fadzillah; Hasnain Hussain; Ibrahim Abdul Razak; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-05-14

2.  (E)-3-[4-(Hex-yloxy)phen-yl]-1-(4-hydroxy-phen-yl)prop-2-en-1-one.

Authors:  Ibrahim Abdul Razak; Hoong-Kun Fun; Zainab Ngaini; Norashikin Irdawaty Abd Rahman; Hasnain Hussain
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-05-29

3.  (E)-1-[4-(Hex-yloxy)phen-yl]-3-(4-hy-droxy-phen-yl)prop-2-en-1-one.

Authors:  Zainab Ngaini; Siti Muhaini Haris Fadzillah; Hasnain Hussain; Ibrahim Abdul Razak; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-12-18

4.  (E)-1-[4-(Hex-yloxy)phen-yl]-3-(3-hy-droxy-phen-yl)prop-2-en-1-one.

Authors:  Zainab Ngaini; Siti Muhaini Haris Fadzillah; Hasnain Hussain; Ibrahim Abdul Razak; Hoong-Kun Fun
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-11-24
  4 in total

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