4,6-Dimethyl-13-oxa-2,4,6-triazatricyclo[8.4.0.0,3,8]tetradeca-1(10),2,8-triene-5,7,14-trione 1g

4,6-Dimethyl-13-oxa-2,4,6-triazatricyclo[8.4.0.0,3,8]tetradeca-1(10),2,8-triene-5,7,14-trione 1g