7,9-dimethyl-3-(thiophene-2-carbonyl)-10-oxa-7-azabicyclo[4.4.0]deca-2,4,11-trien-8-one;(+-)-2,4-Dimethyl-7-(2-thienylcarbonyl)-2H-1,4-benzoxazin-3(4H)-one;
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