Constituents of the aerial parts and roots of some solanum melanogen varieties

ABSTRACT

The aerial parts of Solanum melongena varieties Esculentum nees [Balady Black Long, Balady White Long and Round Black, Fam. Solanaceae] were exhaustively extracted with ethanol [90%] and fractionated into coumarin and unsaponifiable fractions. The coumarin fraction led to the isolation of bergapten [I], umbelliferone [II] and asculetin [III] whereas, beta-amyrin [IV], a mixture of steroidal component viz. stigmasterol [V], beta-sitosterol [VI] and campesterol [VII] were isolated from the unsaponifiable fraction of each plant material in different ratios and were identified using GLC. Also, the roots of Solanum melongena varieties were defatted and treated with ammonium hydroxide to afford the alkaloidal glycoside fractions which were found to contain solasonine [VIII] and solamargine [IX]. Acid hydrolysis of the glycoside mixture indicated the presence of solasodine [X] and a sapogenin diosgenin [XI]