COOH 525 15171921 30 RO malabaricatriene 1 C- H lansioside A R=N-acetyl--D-glucosamine malabaricatriene 2 C1- H lansioside B r= -D-glucose lansiosideC R=-D-xylosemalabaricatriene 1 C13- H lansioside A R=N-acetyl- -D-glucosamine malabaricatriene 2 C13- H lansioside B R= -D-glucose lansioside C R= -D-xylose 1 H 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 RO H H H H COOH 12 3 8 14 18 20 22 23 25 27 29 30 26 24 28