(m-Hydroxyphenyl)-trimethylammonium methylsulfate dimethylphosphate 77967-17-0 AMMONIUM, (m-HYDROXYPHENYL)TRIMETHYL-, METHYLSULFATE, DIMETHYLPHOSPHATE Dimethylphosphostigmine Ro 3-0412 m-(Dimethylphosphato)-N-trimethylanilinium methylsulfate