Not Less Than - 95%
8-methoxy-1,3-dimethyl-12-thioxobenzo[4`,5`]imidazo[2`,1`:2,3]imidazo[1,5-a]pyridin-2(12H)-one compound with 9-methoxy-1,3-dimethyl-12-thioxobenzo[4`,5`]imidazo[2`,1`:2,3]imidazo[1,5-a]pyridin-2(12H)-one (1:1)