(1)Benzopyrano(2,3-b)(1,5)benzodiazepin-13(6H)-one, 6-benzoyl-2-methyl-9-nitro- 115430-67-6 6-Benzoyl-2-methyl-9-nitro-(1)benzopyrano(2,3-b)(1,5)benzodiazepin-13(6H)-one