11048-15-0 2H-Furo[3,2-b]naphtho[2,3-d]pyran-2,6,11-trione, 3,3a,5,11b-tetrahydro-7-hydroxy-5-methyl- 2H-Furo[3,2-b]naphtho[2,3-d]pyran-2,6,11-trione, 3,3a,5,11b-tetrahydro-7-hydroxy-5-methyl-, [3aR-(3a.alpha.,5.alpha.,11b.alpha.)]- Antibiotic U-19,718 KALAFUNGIN Kalamycin NSC137443 U 19718 U-19,718