Secondary Metabolites of Intergeneric Hybrids of the Anthocercideae, Family Solanaceae

Abstract

The tropane and pyridine alkaloids contained in the aerial parts of three putative hybrids of the tribe Anthocercideae, family Solanaceae have been investigated. The cross Cyphanthera albicans x Duboisia myoporoides contains the principal alkaloids of both parents, present in an amount in excess of that normally encountered in Cyphanthera. The hybrid C. myosolidea x Grammosolen dixonii is intermediate between the parents in alkaloids content; the principal base is 6-hydroxyhyoscyamine (a minor constituent of C. myosolidea). A mixture of both tropane and pyridine alkaloids is reported in the hybrid Duboisia hopwoodii x G. dixonii. Ursolic acid has been identified in all specimens of parents and hybrids. The phytochemical results support the botanical deductions concerning the parentage of the three hybrids. Hyoscine is reported for the first time as a component of the alkaloid mixture of the aerial parts of Duboisia hopwoodii.