26594-10-5 BRN 0836309 N-Monoethyleneamidomonoethoxyphosphono-N'-5-methoxypyrimidyl-2-urea P-1-Aziridinyl-N-((5-methoxy-2-pyrimidinyl)carbamoyl)phosphonamidic acid ethyl ester Phosphonamidic acid, P-1-aziridinyl-N-((5-methoxy-2-pyrimidinyl)carbamoyl)-, ethyl ester