AIDS-220615 AIDS220615 Chryseno[1,2-c]furan-3(1H)-one, 1-(acetyloxy)-5,5a,5b,6,7,7a,8,9,10,11,11a,11b,12,13,13a,13b-hexadecahydro-5b,8,8,11a,13a-pentamethyl-, (1R,5aS,5bR,7aS,11aS,11bR,13aS,13bR)-