(-)-7,8-Dihydrocalanolide B (-)-7,8-Dihydrocostatolide 2H,6H,10H-Benzo[1,2-b:3,4-b':5,6-b'']tripyran-2-one, 7,8,11,12-tetrahydro-12-hydroxy-6,6,10,11-tetramethyl-4-propyl-, (10S,11R,12S)- 909-13-7 AIDS-059215 AIDS059215 Dihydro-(-)-calandolide B Dihydrocostatolide NSC661123