9,4-(Epoxy[1,11,13]pentadecatrienoimino)furo[2',3':7,8]naphtho[1,2-d]thiazole-10,26(9H)-dione, 16-(acetyloxy)-2-(ethylamino)-5,6,18,20-tetrahydroxy-14-methoxy-7,9,15,17,19,21,25-heptamethyl-, (9S,14S,15R,16S,17R,18R,19R,20S,21S)- AIDS-113866 AIDS113866