CHEMICAL CONSTITUENTS OF THE BARK OF CRESCENTIA CUJETE
Phan Đức Nhuận
Nguyễn Thị Thảo Ly
Nguyễn Diệu Liên Hoa
Nguyễn Mậu Vũ
Abstract
Five compounds, oleanolic acid (1), 4-hydroxybenzoic acid (2), methyl 4-hydroxybenzoate (3),vanillic acid (4) and methyl vanillate (5), were isolated from an ethyl acetate extract of the bark ofCrescentia cujete collected in Ho Chi Minh City. Their structures were determined using NMRtechniques (1H NMR, DEPT and 13C NMR).