21709-31-9 4-ISOXAZOLECARBOXYLIC ACID, 5-METHYL-3-(5-NITRO-2-FURYL)-, 2-(DIMETHYLAMINO)-2-M 4-Isoxazolecarboxylic acid, 5-methyl-3-(5-nitro-2-furyl)-, 2-(dimethylamino)-2-methylpropyl ester