2H-pyrrolo[2,1-b][1,3]oxazin-6(7H)-one, tetrahydro-8a-methyl- 8a-methyltetrahydro-2H-pyrrolo[2,1-b][1,3]oxazin-6(7H)-one InChI=1/C8H13NO2/c1-8-4-3-7(10)9(8)5-2-6-11-8/h2-6H2,1H