(-)-Calanolide F 179605-72-2 2H,6H,10H-Benzo(1,2-b:3,4-b':5,6-b'')tripyran-2-one, 11,12-dihydro-12-hydroxy-6,6,10,11-tetramethyl-4-propyl-, (10R-(10.alpha.,11.beta.,12.alpha.))- AIDS-051442 AIDS051442 Calanolide F