AIDS-181891 AIDS181891 Octadecanoic acid, (1R,7S,9aR,11aR)-2,3,3a,6,7,8,9,9a,9b,10,11,11a-dodecahydro-9a,11a-dimethyl-1-[(2E,4R)-1,4,5-trimethyl-2-hexenyl]-3b,5a-etheno-1H-benz[c]indeno[5,4-e][1,2]dioxin-7-yl ester