6-Hydroxy-3-oxa-9-azatetracyclo[7.7.1.0^{2,7}.0^{13,17}]heptadeca-1(17),2(7),5,13,15-pentaene-4,8-dione 1g

6-Hydroxy-3-oxa-9-azatetracyclo[7.7.1.0^{2,7}.0^{13,17}]heptadeca-1(17),2(7),5,13,15-pentaene-4,8-dione 1g