The enzymatic glucose cleavage of palicoside revealed the biosynthetic path
way to akagerine, whereas the conversion of dolichantoside led to a new qua
ternary heteroyohimbine alkaloid named N-b-methyl-21-beta -hydroxy-mayumbin
e. The hypothetical models of reactions occurring after the conversion of b
oth substrates are proposed. Dolichantoside and palicoside, as well as Stry
chnos mellodora a stem bark crude ethanol extract, exhibit significant anti
mycotic activity against human pathogens in presence of specific glucosidas
e. (C) 2001 Elsevier Science Ltd. All rights reserved.