A new triterpene fromBarringtonia asiatica

The freeze-dried bark of Barringtonia asiatica afforded a new triterpene: (3β,11α)-11-hydroxyolean-12-en-3-yl palmitate (1). The bark also yielded mixtures of (3β)-olean-12-en-3-yl palmitate (2a), (3β)-urs-12-en-3-yl palmitate (2b) and (3β)-olean-18-en-3-yl palmitate (2c) in a 2 : 1 : 4 ratio; β-amyrin (3a), α-amyrin (3b) and germanicol (3c) in a 3 : 1 : 4 ratio; 22-O-tigloylcamelliagenin A (4a) and betulinic acid (4b) in a 2 : 1 ratio;...