77928-51-9 AIDS-129521 AIDS129521 Bis(4a,8-dimethyl-3-methylene-2,5-dioxo-2,3,3a,4,4a,5,7a,8,9,9a-decahydroazuleno[6,5-b]furan-4-yl) pentanedioate Bis(helenalinyl)glutarate NSC352330