2-Pyrrolidineacetamide, 4-[6-(1,4-dimethylspiro[2,9-dioxabicyclo[3.3.1]non-6-ene-8,2'-oxiran-3-yl)-1-hydroxy-4-methyl-2,4-heptadienylidene]-N,.alpha.-dimethyl-3,5-dioxo-1-(tetrahydro-5-hydroxy-6-methyl-2H-pyran-2-yl)- 3-Pyrroline-2-acetamide, 4-[6-(1,4-dimethylspiro[2,9-dioxabicyclo[3.3.1]non-6-ene-8,2'-oxiran]-3-yl)-4-methyl-2,4-heptadienoyl]-3-hydroxy-N,.alpha.-dimethyl-5-oxo-1-(tetrahydro-5-hydroxy-6-methyl-2H-pyran-2-yl)- 7229-50-7 Antibiotic d-45 Free acid NSC3360 PORTAMYCIN STREPTOLYDIGIN