streptazolin streptazolin streptazolin is an antibiotic and antifungal substance isolated in 1981 from streptomyces viridochromogenes. streptazolin names preferred iupac name (2as,2a1s,3s,4z)-4-ethylidene-3-hydroxy-2a,2a1,3,4,6,7-hexahydro-1h-2-oxa-7a-azacyclopentainden-1-one identifiers cas number 80152-07-4 n 3d model (jsmol) interactive image chembl chembl450203 chemspider 9944359 pubchem cid 11769676 inchi inchi=1s/c11h13no3/c1-2-6-7-4-3-5-12-8(7)10(9(6)13)15-11(12)14/h2,4, 8-10,13h,3,5h2,1h3/b6-2-/t8-,9-,10-/m0/s1key: ojiuacoqfbqcdf-ikxjtioisa-n smiles c=3ccn1c(=o)oc2c1c=3\c(=c\c)\c2o properties chemical formula c11h13no3 molar mass 207.229 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references because of its polymerisation tendency, it is not suitable for therapeutic use. 1,4-reduction of the conjugated diene gives dihydrostreptazolin which is stable, but has very limited antimicrobial properties. the first total synthesis of (racemic) streptazolin was achieved in 1985 with the aid of a modified ferrier rearrangement. (+)-dihydrostreptazolin