3,5-Methano-1H,4H-benzo(c)pyrazino(3,2,1-ij)(1,5)naphthyridine-2,6-dicarbonitrile, 2,3,3a,5,6,8,9,12,12b,12c-decahydro-1-(2-hydroxyethyl)-8-(hydroxymethyl)-10-methoxy-4,11-dimethyl-9,12-dioxo-, (2R-(2alpha,3beta,3aalpha,5beta,6alpha,8beta,12b.