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7664638 
Journal Article 
Triterpenoids from the orchid Eria acervata 
Majumder, PL; Rahaman, B; , 
2006 
Yes 
Journal of the Indian Chemical Society
ISSN: 0019-4522 
SCIENTIFIC PUBL-INDIA 
JODHPUR 
58-64 
WOS:000235488100012 
Acervatol and acervatone, two new triterpenoids, were isolated from the orchid Eria acervata. The structures of acervatol and acervatone were established as 24,24-dimethyl-lanosta-9(11)-en-3 beta-ol (2a) and 24,24-dimethyl-lanosta-9(11)-en-3-one (2c), respectively, from spectral and chemical evidence. These triterpenoids are of considerable biogenetic importance providing circumstantial evidence for the modification of the C-17 side chain of the lanostane skeleton through methionine-induced C-methylation involving allylic rearrangement.