A 1441 (OTTO) 3-Amino-5-methylisoxazole, ≥97% Cas 1072-67-9 - used in synthesis of naphtho[1,2-e][1,3]oxazines. A 1441 (OTTO) 3-Amino-5-methylisoxazole, ≥97% Cas 1072-67-9 - used in synthesis of series of 1-aryl-4-methyl-3,6-bis-(5-methylisoxazol-3-yl)-2-thioxo-2,3,6,10b-tetrahydro-1H-pyrimido[5,4-c]quinolin-5-ones, having potential mosquito larvicidal activity.