11031-82-6 6,9-Metheno-9H-1,3-dioxino[4,5,6-uv][4]benzazacyclo tricosine-20-carboxylic acid, 7,21-bis(acetyloxy)- 5,10,11,16,17,18,19,20,21,22,23,24-dodecahydro- 17,19,23,24,27-pentahydroxy-4,8,12,16,18,22,24,26- octamethyl-5,11-dioxo-, methyl ester NSC156215 Streptovaricin B Streptovaricin complex, fraction b Streptovaricinoic acid, methyl ester, 21-acetate