| Title:  Mepenzolate Bromide CAS Registry Number:  76-90-4 CAS Name:  3-[(Hydroxydiphenylacetyl)oxy]-1,1-dimethylpiperidinium bromide Additional Names:  N-methyl-3-piperidyl benzilate methyl bromide;  N-methyl-3-piperidyl diphenylglycolate methobromide Trademarks:  Cantil (Aventis);  Trancolon (Fujisawa) Molecular Formula:  C21H26BrNO3 Molecular Weight:  420.34 Percent Composition:  C 60.00%, H 6.23%, Br 19.01%, N 3.33%, O 11.42% Literature References:  Anticholinergic.  Prepn:  Biel, US 2918408 (1959 to Lakeside Labs.).  Prepn of base:  Biel et al., J. Am. Chem. Soc. 77, 2250 (1955).  Crystal structure:  J. M. Leger et al., Acta Crystallogr. B35, 886 (1979).  Toxicity data:  E. I. Goldenthal, Toxicol. Appl. Pharmacol. 18, 185 (1971). Properties:  Crystals, mp 228-229° (dec).  LD50 orally in rats:  742±47 mg/kg (Goldenthal). Melting point:  mp 228-229° (dec) Toxicity data:  LD50 orally in rats:  742±47 mg/kg (Goldenthal)   Derivative Type:  Free base  CAS Registry Number:  25990-43-6 Properties:  bp0.03 175-176°. Boiling point:  bp0.03 175-176°   NOTE:  N-Methyl-3-piperidyl benzilate is a controlled substance (hallucinogen):  21 CFR, 1308.11. Therap-Cat:  Antispasmodic. Keywords:  Antispasmodic; Antimuscarinic.  |