Partially-acetylated dodecanyl tri- and tetra-rhamnoside derivatives from Cleistopholis glauca (annonaceae)

Abstract Five partially-acetylated derivatives (1)-(5) of 1- o -dodecanyl α-L-rhamnopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→3)-α-L-rhamnopyranosyl-(1→4)-α-L-rhamnopyranoside have been isolated from the bark of Cleistopholis glauca (Annonaceae) and their structures elucidated by using COSY, delayed COSY, and FAB Mass spectroscopy. The trisaccharide 1- o -dodecanyl α-L-2,3,4-triacetylrhamnopyranosyl-(1→3)-α-L-4-acetylrhamno-pyranosyl-(1→4)-α-L-rhamnopyranoside (6) was also isolated.