8-Benzyl-5,21-di-sec-butyl-11-isopropyl-9,14,14-trimethyl-15-pent-4-enyl-tetradecahydro-6,16-dioxa-3a,9,12,19,22-pentaaza-cyclopentacyclodocosene-4,7,10,13,17,20,23-heptaone AIDS-220613 AIDS220613 Pitipeptolide B