6-chloro-2-hydroxy-10-methyl-9$l^{6}-thia-10-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaene-9,9-dione
6-chloro-2-hydroxy-10-methyl-9λ6-thia-10-azatricyclo[9.4.0.03,8]pentadeca-1(11),3(8),4,6,12,14-hexaene-9,9-dione
6-chloro-2-hydroxy-10-methyl-9λ6-thia-10-azatricyclo[9.4.0.03,8]pentadeca-1(15),3,5,7,11,13-hexaene-9,9-dione