(+)-Dihydrocalanolide A 183904-53-2 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-, (10R,11S,12S)- AIDS-030484 AIDS030484 Dihydrocalanolide A NSC678323