Alvaradoins A−D. Anthracenone C Arabinosides from Alvaradoa jamaicensis

The aerial parts of Alvaradoa jamaicensis have yielded four new compounds. These are both C-10 epimers of 10-C-[4‘-O-acetyl-3‘-O-(3-methylbut-2-enoyl)]-β-d-arabinopyranosyl-1,8-dihydroxy-6-methoxy-3-methyl-anthracen-9(10H)-one (3 and 4) and of 10-C-[4‘-O-acetyl-3‘-O-(3-methylbut-2-enoyl)]-β-d-arabinopyranosyl-1,8,10-trihydroxy-6-methoxy-3-methyl-anthracen-9-one (5 and 6). The anthraquinones chrysophanol (1) and physcion (2) were also isolated.