tetrazomine

3-Hydroxy-N-[[2a,3,4,5,6,6a,7,11b-octahydro-5-(hydroxymethyl)-11-methoxy-12-methyl-3,6-epimino-1H-2-oxa-11c-aza-11cH-naphth[1,2,3-cd]azulen]-10-yl]piperidine-2-carboxamide