417-A 5-18-01-00142 (Beilstein Handbook Reference) 52146-62-0 7-Oxabicyclo(4.1.0)hept-3-en-2-one, 5-hydroxy-3-methyl-, (1R-(1-alpha,5-beta,6-alpha))- Antibiotic 417-A BRN 1563789 Epoformin