22268-16-2 31179-82-5 55809-88-6 9,10-Anthracenedione, 1,2,3,4-tetrahydro-1,2,3,4,5-pentahydroxy-7-methoxy-2-methyl-, (1R-(1alpha,2beta,3beta,4alpha))- Altersolanol A As-A 2 NSC 173943