Literature DB >> 21754164

2-Dicyclo-hexyl-amino-3-phenyl-5,6-di-hydro-8H-thio-pyrano[4',3':4,5]thieno[2,3-d]pyrimidin-4(3H)-one.

Xizhen Liang, Yueming Zhou.   

Abstract

In the title compound, C(27)H(33)N(3)OS(2), the dihedral angle between the two fused rings of the thieno[3,2-d]pyrimidine system is 3.73 (9)°. The phenyl ring is twisted with respect to the pyrimidine ring [dihedral angle = 71.60 (10)°] and the thio-pyran ring shows an envelope conformation with the S atom as the flap. An intra-molecular C-H⋯O inter-action occurs. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds occur.

Entities:  

Year:  2011        PMID: 21754164      PMCID: PMC3100021          DOI: 10.1107/S1600536811009226

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


Related literature

For the properties of compounds containing the thieno­pyrimidine system, see: Santagati et al. (2002 ▶); Kikuchi et al. (2006 ▶). For related crystal structures, see: Hu et al. (2007 ▶); Xie et al. (2008 ▶).

Experimental

Crystal data

C27H33N3OS2 M = 479.70 Monoclinic, a = 10.7118 (10) Å b = 22.601 (2) Å c = 10.924 (1) Å β = 109.939 (1)° V = 2486.1 (4) Å3 Z = 4 Mo Kα radiation μ = 0.24 mm−1 T = 293 K 0.30 × 0.25 × 0.18 mm

Data collection

Bruker SMART CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2007 ▶) T min = 0.802, T max = 0.874 12466 measured reflections 4365 independent reflections 3391 reflections with I > 2σ(I) R int = 0.027 Standard reflections: ?

Refinement

R[F 2 > 2σ(F 2)] = 0.039 wR(F 2) = 0.097 S = 1.00 4365 reflections 298 parameters H-atom parameters constrained Δρmax = 0.25 e Å−3 Δρmin = −0.26 e Å−3 Data collection: SMART (Bruker, 2007 ▶); cell refinement: SAINT (Bruker, 2007 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: SHELXTL. Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536811009226/hb5802sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536811009226/hb5802Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C27H33N3OS2F(000) = 1024
Mr = 479.70Dx = 1.282 Mg m3
Monoclinic, P21/cMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybcCell parameters from 4365 reflections
a = 10.7118 (10) Åθ = 2.0–25.0°
b = 22.601 (2) ŵ = 0.24 mm1
c = 10.924 (1) ÅT = 293 K
β = 109.939 (1)°Block, yellow
V = 2486.1 (4) Å30.30 × 0.25 × 0.18 mm
Z = 4
Bruker DIFFRACTOMETER TYPE????diffractometer3391 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tubeRint = 0.027
graphiteθmax = 25.0°, θmin = 2.0°
Absorption correction: multi-scan (SADABS; Bruker, 2007)h = −12→11
Tmin = 0.802, Tmax = 0.874k = −17→26
12466 measured reflectionsl = −12→12
4365 independent reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.039Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.097H-atom parameters constrained
S = 1.00w = 1/[σ2(Fo2) + (0.0373P)2 + 1.0362P] where P = (Fo2 + 2Fc2)/3
4365 reflections(Δ/σ)max < 0.001
298 parametersΔρmax = 0.25 e Å3
0 restraintsΔρmin = −0.26 e Å3
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
S10.52363 (5)0.09045 (3)0.58192 (5)0.05635 (17)
S20.36688 (6)−0.00416 (3)0.84325 (5)0.06459 (19)
N20.39389 (15)0.14368 (7)0.35103 (15)0.0446 (4)
N10.17515 (14)0.11220 (7)0.23197 (14)0.0381 (4)
O10.06017 (13)0.04696 (6)0.31444 (12)0.0520 (4)
C60.28078 (18)0.07129 (8)0.44376 (17)0.0392 (4)
C70.38904 (18)0.10337 (8)0.44241 (18)0.0414 (4)
C40.30430 (18)0.03617 (8)0.55936 (17)0.0408 (4)
C80.28574 (17)0.14842 (8)0.24936 (17)0.0382 (4)
C50.43038 (19)0.04268 (9)0.64211 (18)0.0456 (5)
C30.2018 (2)−0.00226 (10)0.5853 (2)0.0532 (5)
H3A0.1593−0.02650.50910.064*
H3B0.13420.02280.59900.064*
C10.4921 (2)0.01507 (10)0.7740 (2)0.0568 (6)
H1A0.55470.04260.83120.068*
H1B0.5405−0.02020.76640.068*
C20.2587 (2)−0.04225 (10)0.7023 (2)0.0587 (6)
H2A0.3078−0.07400.67980.070*
H2B0.1862−0.05990.72380.070*
N30.27679 (15)0.18922 (7)0.15363 (15)0.0417 (4)
C90.08042 (18)0.10101 (8)0.10264 (17)0.0392 (4)
C220.39403 (19)0.20341 (9)0.11691 (19)0.0455 (5)
H220.35990.22800.03860.055*
C200.16227 (19)0.23014 (9)0.11292 (18)0.0455 (5)
H200.09660.21390.14810.055*
C100.12331 (19)0.07079 (9)0.01470 (18)0.0447 (5)
H100.21150.05890.03790.054*
C14−0.05072 (19)0.11717 (9)0.07028 (19)0.0485 (5)
H14−0.08030.13620.13070.058*
C270.5036 (2)0.23963 (10)0.2115 (2)0.0563 (5)
H27A0.54260.21760.29180.068*
H27B0.46690.27600.23190.068*
C230.4467 (2)0.14866 (10)0.0736 (2)0.0576 (6)
H23A0.37500.12900.00650.069*
H23B0.47990.12170.14660.069*
C13−0.1378 (2)0.10476 (11)−0.0530 (2)0.0595 (6)
H13−0.22630.1162−0.07620.071*
C12−0.0948 (2)0.07562 (11)−0.1418 (2)0.0597 (6)
H12−0.15380.0677−0.22490.072*
C150.0939 (2)0.23351 (11)−0.0339 (2)0.0597 (6)
H15A0.07360.1939−0.06920.072*
H15B0.15290.2519−0.07310.072*
C260.6108 (2)0.25425 (11)0.1533 (3)0.0683 (7)
H26A0.57350.27980.07830.082*
H26B0.68220.27560.21720.082*
C190.1943 (2)0.29232 (9)0.1691 (2)0.0593 (6)
H19A0.23790.29010.26270.071*
H19B0.25420.31160.13220.071*
C110.0352 (2)0.05831 (10)−0.1077 (2)0.0533 (5)
H110.06400.0381−0.16730.064*
C240.5580 (2)0.16290 (11)0.0206 (2)0.0696 (7)
H24A0.59610.12620.00350.083*
H24B0.52110.1839−0.06140.083*
C250.6657 (2)0.19973 (11)0.1127 (3)0.0735 (7)
H25A0.71260.17650.18920.088*
H25B0.72890.21100.07090.088*
C16−0.0336 (2)0.26934 (13)−0.0668 (2)0.0789 (8)
H16A−0.07340.2729−0.16060.095*
H16B−0.09590.2486−0.03520.095*
C17−0.0084 (3)0.33031 (13)−0.0069 (3)0.0926 (10)
H17A−0.09270.3501−0.02220.111*
H17B0.04190.3532−0.04910.111*
C180.0670 (3)0.32814 (12)0.1378 (3)0.0844 (8)
H18A0.01100.31060.18160.101*
H18B0.08860.36810.17040.101*
C280.16231 (18)0.07445 (8)0.33148 (17)0.0387 (4)
U11U22U33U12U13U23
S10.0443 (3)0.0596 (4)0.0528 (3)−0.0111 (3)0.0006 (2)0.0144 (3)
S20.0742 (4)0.0727 (4)0.0432 (3)−0.0018 (3)0.0152 (3)0.0092 (3)
N20.0419 (9)0.0445 (9)0.0433 (9)−0.0061 (7)0.0092 (7)0.0063 (8)
N10.0373 (8)0.0404 (9)0.0349 (8)−0.0025 (7)0.0104 (6)0.0018 (7)
O10.0453 (8)0.0625 (9)0.0443 (8)−0.0166 (7)0.0101 (6)0.0039 (7)
C60.0411 (10)0.0366 (10)0.0386 (10)−0.0021 (8)0.0117 (8)−0.0009 (8)
C70.0404 (10)0.0397 (11)0.0413 (10)−0.0016 (9)0.0103 (8)0.0024 (9)
C40.0457 (11)0.0351 (10)0.0383 (10)−0.0020 (8)0.0100 (8)0.0004 (8)
C80.0394 (10)0.0370 (10)0.0388 (10)0.0004 (8)0.0141 (8)−0.0005 (8)
C50.0487 (11)0.0398 (11)0.0426 (10)−0.0043 (9)0.0079 (9)0.0034 (9)
C30.0517 (12)0.0558 (13)0.0463 (12)−0.0094 (10)0.0093 (10)0.0103 (10)
C10.0571 (13)0.0532 (13)0.0480 (12)−0.0049 (11)0.0022 (10)0.0092 (10)
C20.0591 (13)0.0567 (14)0.0568 (13)−0.0099 (11)0.0152 (11)0.0150 (11)
N30.0416 (9)0.0401 (9)0.0445 (9)0.0000 (7)0.0162 (7)0.0072 (7)
C90.0384 (10)0.0393 (10)0.0369 (10)−0.0018 (8)0.0091 (8)0.0029 (8)
C220.0475 (11)0.0442 (11)0.0483 (11)−0.0031 (9)0.0208 (9)0.0034 (9)
C200.0482 (11)0.0447 (11)0.0460 (11)0.0075 (9)0.0193 (9)0.0099 (9)
C100.0422 (10)0.0426 (11)0.0487 (11)−0.0026 (9)0.0147 (9)−0.0026 (9)
C140.0404 (11)0.0585 (13)0.0469 (11)0.0016 (10)0.0151 (9)0.0003 (10)
C270.0519 (12)0.0535 (13)0.0639 (13)−0.0087 (10)0.0202 (11)−0.0068 (11)
C230.0582 (13)0.0525 (13)0.0680 (14)−0.0024 (11)0.0292 (11)−0.0060 (11)
C130.0364 (11)0.0755 (16)0.0592 (13)0.0009 (11)0.0066 (10)0.0043 (12)
C120.0542 (13)0.0705 (16)0.0438 (12)−0.0097 (12)0.0032 (10)−0.0024 (11)
C150.0596 (13)0.0700 (15)0.0468 (12)0.0126 (12)0.0146 (10)0.0122 (11)
C260.0562 (14)0.0533 (14)0.0955 (18)−0.0121 (11)0.0261 (13)0.0016 (13)
C190.0732 (15)0.0461 (12)0.0663 (14)0.0049 (11)0.0339 (12)0.0014 (11)
C110.0595 (13)0.0543 (13)0.0468 (12)−0.0083 (11)0.0190 (10)−0.0084 (10)
C240.0741 (16)0.0686 (16)0.0815 (17)0.0040 (13)0.0466 (14)−0.0009 (14)
C250.0535 (14)0.0666 (16)0.111 (2)0.0017 (13)0.0422 (14)0.0132 (15)
C160.0654 (16)0.100 (2)0.0686 (16)0.0253 (15)0.0187 (13)0.0350 (16)
C170.094 (2)0.078 (2)0.119 (3)0.0398 (17)0.0537 (19)0.0499 (19)
C180.104 (2)0.0562 (16)0.109 (2)0.0245 (15)0.0563 (19)0.0098 (16)
C280.0406 (10)0.0377 (10)0.0375 (10)−0.0027 (9)0.0130 (8)−0.0020 (8)
S1—C71.7286 (19)C14—C131.381 (3)
S1—C51.745 (2)C14—H140.9300
S2—C21.799 (2)C27—C261.526 (3)
S2—C11.803 (2)C27—H27A0.9700
N2—C81.308 (2)C27—H27B0.9700
N2—C71.365 (2)C23—C241.527 (3)
N1—C81.399 (2)C23—H23A0.9700
N1—C281.425 (2)C23—H23B0.9700
N1—C91.453 (2)C13—C121.375 (3)
O1—C281.216 (2)C13—H130.9300
C6—C71.372 (3)C12—C111.370 (3)
C6—C281.435 (2)C12—H120.9300
C6—C41.439 (2)C15—C161.522 (3)
C4—C51.353 (3)C15—H15A0.9700
C4—C31.500 (3)C15—H15B0.9700
C8—N31.373 (2)C26—C251.497 (3)
C5—C11.501 (3)C26—H26A0.9700
C3—C21.514 (3)C26—H26B0.9700
C3—H3A0.9700C19—C181.521 (3)
C3—H3B0.9700C19—H19A0.9700
C1—H1A0.9700C19—H19B0.9700
C1—H1B0.9700C11—H110.9300
C2—H2A0.9700C24—C251.498 (3)
C2—H2B0.9700C24—H24A0.9700
N3—C221.478 (2)C24—H24B0.9700
N3—C201.478 (2)C25—H25A0.9700
C9—C141.376 (3)C25—H25B0.9700
C9—C101.379 (3)C16—C171.509 (4)
C22—C231.502 (3)C16—H16A0.9700
C22—C271.513 (3)C16—H16B0.9700
C22—H220.9800C17—C181.511 (4)
C20—C151.521 (3)C17—H17A0.9700
C20—C191.525 (3)C17—H17B0.9700
C20—H200.9800C18—H18A0.9700
C10—C111.377 (3)C18—H18B0.9700
C10—H100.9300
C7—S1—C591.39 (9)H27A—C27—H27B108.1
C2—S2—C196.33 (10)C22—C23—C24111.83 (19)
C8—N2—C7115.60 (16)C22—C23—H23A109.2
C8—N1—C28122.99 (14)C24—C23—H23A109.2
C8—N1—C9120.81 (14)C22—C23—H23B109.2
C28—N1—C9114.86 (14)C24—C23—H23B109.2
C7—C6—C28117.97 (17)H23A—C23—H23B107.9
C7—C6—C4113.91 (16)C12—C13—C14120.5 (2)
C28—C6—C4128.07 (17)C12—C13—H13119.8
N2—C7—C6127.12 (17)C14—C13—H13119.8
N2—C7—S1121.94 (14)C11—C12—C13119.9 (2)
C6—C7—S1110.80 (14)C11—C12—H12120.0
C5—C4—C6111.25 (17)C13—C12—H12120.0
C5—C4—C3124.39 (17)C20—C15—C16110.26 (18)
C6—C4—C3124.36 (16)C20—C15—H15A109.6
N2—C8—N3120.91 (16)C16—C15—H15A109.6
N2—C8—N1122.10 (16)C20—C15—H15B109.6
N3—C8—N1116.99 (15)C16—C15—H15B109.6
C4—C5—C1127.50 (18)H15A—C15—H15B108.1
C4—C5—S1112.64 (14)C25—C26—C27111.91 (19)
C1—C5—S1119.85 (14)C25—C26—H26A109.2
C4—C3—C2113.29 (17)C27—C26—H26A109.2
C4—C3—H3A108.9C25—C26—H26B109.2
C2—C3—H3A108.9C27—C26—H26B109.2
C4—C3—H3B108.9H26A—C26—H26B107.9
C2—C3—H3B108.9C18—C19—C20109.8 (2)
H3A—C3—H3B107.7C18—C19—H19A109.7
C5—C1—S2110.84 (15)C20—C19—H19A109.7
C5—C1—H1A109.5C18—C19—H19B109.7
S2—C1—H1A109.5C20—C19—H19B109.7
C5—C1—H1B109.5H19A—C19—H19B108.2
S2—C1—H1B109.5C12—C11—C10120.1 (2)
H1A—C1—H1B108.1C12—C11—H11119.9
C3—C2—S2113.16 (15)C10—C11—H11119.9
C3—C2—H2A108.9C25—C24—C23112.6 (2)
S2—C2—H2A108.9C25—C24—H24A109.1
C3—C2—H2B108.9C23—C24—H24A109.1
S2—C2—H2B108.9C25—C24—H24B109.1
H2A—C2—H2B107.8C23—C24—H24B109.1
C8—N3—C22120.49 (15)H24A—C24—H24B107.8
C8—N3—C20118.98 (14)C26—C25—C24111.5 (2)
C22—N3—C20118.51 (15)C26—C25—H25A109.3
C14—C9—C10120.40 (18)C24—C25—H25A109.3
C14—C9—N1121.13 (17)C26—C25—H25B109.3
C10—C9—N1118.38 (16)C24—C25—H25B109.3
N3—C22—C23110.62 (16)H25A—C25—H25B108.0
N3—C22—C27117.73 (16)C17—C16—C15111.7 (2)
C23—C22—C27111.94 (17)C17—C16—H16A109.3
N3—C22—H22105.1C15—C16—H16A109.3
C23—C22—H22105.1C17—C16—H16B109.3
C27—C22—H22105.1C15—C16—H16B109.3
N3—C20—C15113.60 (16)H16A—C16—H16B107.9
N3—C20—C19113.94 (17)C16—C17—C18112.1 (2)
C15—C20—C19109.83 (18)C16—C17—H17A109.2
N3—C20—H20106.3C18—C17—H17A109.2
C15—C20—H20106.3C16—C17—H17B109.2
C19—C20—H20106.3C18—C17—H17B109.2
C11—C10—C9119.78 (19)H17A—C17—H17B107.9
C11—C10—H10120.1C17—C18—C19111.8 (2)
C9—C10—H10120.1C17—C18—H18A109.3
C9—C14—C13119.21 (19)C19—C18—H18A109.3
C9—C14—H14120.4C17—C18—H18B109.3
C13—C14—H14120.4C19—C18—H18B109.3
C22—C27—C26110.57 (18)H18A—C18—H18B107.9
C22—C27—H27A109.5O1—C28—N1120.33 (16)
C26—C27—H27A109.5O1—C28—C6126.36 (17)
C22—C27—H27B109.5N1—C28—C6113.24 (16)
C26—C27—H27B109.5
C8—N2—C7—C6−5.7 (3)C20—N3—C22—C23−138.37 (18)
C8—N2—C7—S1179.04 (14)C8—N3—C22—C27−72.5 (2)
C28—C6—C7—N27.6 (3)C20—N3—C22—C2791.2 (2)
C4—C6—C7—N2−174.80 (18)C8—N3—C20—C15−131.05 (19)
C28—C6—C7—S1−176.68 (14)C22—N3—C20—C1565.0 (2)
C4—C6—C7—S10.9 (2)C8—N3—C20—C19102.2 (2)
C5—S1—C7—N2174.90 (17)C22—N3—C20—C19−61.8 (2)
C5—S1—C7—C6−1.09 (16)C14—C9—C10—C112.0 (3)
C7—C6—C4—C5−0.2 (2)N1—C9—C10—C11178.53 (17)
C28—C6—C4—C5177.14 (19)C10—C9—C14—C13−2.4 (3)
C7—C6—C4—C3179.31 (19)N1—C9—C14—C13−178.87 (18)
C28—C6—C4—C3−3.4 (3)N3—C22—C27—C26−175.41 (18)
C7—N2—C8—N3177.25 (16)C23—C22—C27—C2654.7 (2)
C7—N2—C8—N1−3.5 (3)N3—C22—C23—C24173.60 (18)
C28—N1—C8—N210.6 (3)C27—C22—C23—C24−53.0 (2)
C9—N1—C8—N2−155.50 (17)C9—C14—C13—C121.2 (3)
C28—N1—C8—N3−170.12 (16)C14—C13—C12—C110.5 (4)
C9—N1—C8—N323.8 (2)N3—C20—C15—C16171.91 (19)
C6—C4—C5—C1178.0 (2)C19—C20—C15—C16−59.2 (2)
C3—C4—C5—C1−1.4 (3)C22—C27—C26—C25−55.9 (3)
C6—C4—C5—S1−0.7 (2)N3—C20—C19—C18−171.88 (18)
C3—C4—C5—S1179.85 (16)C15—C20—C19—C1859.4 (2)
C7—S1—C5—C41.02 (17)C13—C12—C11—C10−1.0 (3)
C7—S1—C5—C1−177.80 (18)C9—C10—C11—C12−0.3 (3)
C5—C4—C3—C2−10.5 (3)C22—C23—C24—C2552.1 (3)
C6—C4—C3—C2170.07 (19)C27—C26—C25—C2455.1 (3)
C4—C5—C1—S2−23.8 (3)C23—C24—C25—C26−53.0 (3)
S1—C5—C1—S2154.80 (12)C20—C15—C16—C1755.8 (3)
C2—S2—C1—C549.27 (17)C15—C16—C17—C18−52.8 (3)
C4—C3—C2—S247.5 (2)C16—C17—C18—C1953.3 (3)
C1—S2—C2—C3−64.11 (18)C20—C19—C18—C17−56.4 (3)
N2—C8—N3—C2235.6 (3)C8—N1—C28—O1174.84 (17)
N1—C8—N3—C22−143.67 (16)C9—N1—C28—O1−18.3 (2)
N2—C8—N3—C20−127.97 (19)C8—N1—C28—C6−8.0 (2)
N1—C8—N3—C2052.7 (2)C9—N1—C28—C6158.83 (16)
C8—N1—C9—C14−119.1 (2)C7—C6—C28—O1176.52 (19)
C28—N1—C9—C1473.7 (2)C4—C6—C28—O1−0.7 (3)
C8—N1—C9—C1064.4 (2)C7—C6—C28—N1−0.4 (2)
C28—N1—C9—C10−102.80 (19)C4—C6—C28—N1−177.64 (17)
C8—N3—C22—C2357.9 (2)
D—H···AD—HH···AD···AD—H···A
C2—H2B···O1i0.972.543.359 (3)142
C11—H11···O1ii0.932.573.199 (3)126
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
C2—H2B⋯O1i0.972.543.359 (3)142
C11—H11⋯O1ii0.932.573.199 (3)126

Symmetry codes: (i) ; (ii) .

  4 in total

1.  A short history of SHELX.

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

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Authors:  Natale Alfredo Santagati; Orazio Prezzavento; Ennio Bousquet; Giuseppe Ronsisvalle; Santi Spampinato
Journal:  J Pharm Pharmacol       Date:  2002-05       Impact factor: 3.765

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Authors:  Haruhisa Kikuchi; Keisuke Yamamoto; Seiko Horoiwa; Shingo Hirai; Ryota Kasahara; Norimitsu Hariguchi; Makoto Matsumoto; Yoshiteru Oshima
Journal:  J Med Chem       Date:  2006-07-27       Impact factor: 7.446

4.  3-Phenyl-2-(piperidin-1-yl)-3,5,6,8-tetra-hydro-4H-thio-pyrano[3',4':2,3]thieno[5,4-d]pyrimidin-4-one.

Authors:  Hai Xie; Shuang-Ming Meng; Yue-Qin Fan; Yong Guo
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2008-11-26
  4 in total

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