Cycloart-25-ene-3,24-diol

(24R)-Cycloart-25-ene-3beta,24-diol may be an anti-tumor promoter, it exhibits inhibitory effects on both Epstein-Barr virus early antigen (EBV-EA) and (+/-)-(E)-methtyl-2-[(E)-hydroxyimino]-5-nitro-6-methoxy-3- hexemide (NOR 1) activation.