56257-59-1Relevant articles and documents
Secondary Mould Metabolites. Part 16. Stemphyltoxins, New Reduced Perylenequinone Metabolites from Stemphylium botryosum var. Lactucum
Arnone, Alberto,Nasini, Gianiuca,Merlini, Lucio,Assante, Gemma
, p. 525 - 530 (2007/10/02)
The structure and stereochemistry of stemphyltoxins I-IV (1)-(4), four epoxy derivatives of reduced perylenequinones isolated from the fungus Stemphylium botryosum var.Lactucum, have been elucidated, mainly on the basis of n.m.r. evidence.A further metabolite, stemphyperylenol (5), is a hexahydro-1,4,7,10-tetrahydroxyperylene-3,9-quinone, a structure which suggests an unusual head-to-tail biosynthetic coupling of two pentaketide units.