(m-Hydroxyphenyl)-trimethylammonium methylsulfate di-sec-butylphosphate 77967-13-6 AMMONIUM, (m-HYDROXYPHENYL)TRIMETHYL-, METHYLSULFATE, DI-sec-BUTYLPHOSPHATE Di-sec-butylphosphostigmine Ro 3-0397 m-(Di-sec-butylphosphato)-N-trimethylanilinium methylsulfate