11048-15-0 3,3a,5,11b-Tetrahydro-7-hydroxy-5-methyl-2H-furo[3,2-b]naphtho[2,3-d]pyran-2,6,11-trione AIDS-010617 AIDS010617 Antibiotic U-19,718 Kalafungin Kalamycin NSC137443