| Literature DB >> 15270574 |
P Krishnaiah1, V L N Reddy, G Venkataramana, K Ravinder, M Srinivasulu, T V Raju, K Ravikumar, D Chandrasekar, S Ramakrishna, Y Venkateswarlu.
Abstract
Three new lamellarin alkaloids, lamellarins gamma (1), alpha (2), and epsilon (3), along with eight known lamellarin alkaloids, lamellarins M (4), K (5), K-diacetate (6), K-triacetate (7), U (8), I (9), C-diacetate (10), and X-triacetate (11), have been isolated from the Indian ascidian Didemnum obscurum. The structures of 1-11 were established using standard spectroscopic techniques. The structure of lamellarin K-triacetate (7) was further confirmed by X-ray crystallographic analysis. The antioxidant properties of lamellarin gamma, lamellarin gamma-monoacetate, lamellarins K, U, and I, and lamellarin C-diacetate were evaluated.Entities:
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Year: 2004 PMID： 15270574 DOI： 10.1021/np030503t
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050