(+-)-2,4-Dimethyl-7-(2-thienylcarbonyl)-2H-1,4-benzoxazin-3(4H)-one 123172-54-3 2H-1,4-Benzoxazin-3(4H)-one, 2,4-dimethyl-7-(2-thienylcarbonyl)-, (+-)- BRN 5979437