6h-furo(2',3':4,5)oxazolo(3,2-a)pyrimidin-6-one, 2,3,3a,9a-tetrahydro-3-hydroxy-2-(hydroxymethyl)-7-methyl-, (2r,3r,3as,9ar)-
6h-furo(2',3':4,5)oxazolo(3,2-a)pyrimidin-6-one, 2,3,3a,9a-tetrahydro-3-hydroxy-2-(hydroxymethyl)-7-methyl-, (2r,3r,3as,9ar)-