16-(Acetyloxy)-3,7-dioxo-29-nordammara-1,17(20),24-trien-21-oic acid 29-Nordammara-1,17(20),24-trien-21-oic acid, 6,16-bis(acetyloxy)-3,7-dioxo-, (4-alpha,6-beta,8-alpha,9-beta,13-alpha,14-beta,16-beta,17-beta)- 29400-42-8 3-10-00-04777 (Beilstein Handbook Reference) BRN 3230584 Fumigacin Helvolic acid NSC 319943