Prifinium Bromide
Title: Prifinium Bromide
CAS Registry Number: 4630-95-9
CAS Name: 3-(Diphenylmethylene)-1,1-diethyl-2-methylpyrrolidinium bromide
Additional Names: 3-(diphenylmethylene)-1-ethyl-2-methylpyrrolidine ethyl bromide; pyrodifenium bromide
Trademarks: Padrin (Fujisawa); Riabal (Fujisawa)
Molecular Formula: C22H28BrN
Molecular Weight: 386.37
Percent Composition: C 68.39%, H 7.30%, Br 20.68%, N 3.63%
Literature References: Prepn: Sadao Oki, JP 65 22462 (1965), C.A. 64, 3489a (1966); of the free base: idem, JP 65 17015 (1965), C.A. 63, 18034b (1965). Ganglion blocking agent. Metabolism: Nakai et al., Arzneim.-Forsch. 20, 1112 (1970). Toxicity studies: Kumada et al., ibid. 22, 706 (1972).
Properties: Crystals, mp 216-218°. (Free base, bp0.15 183-185°). LD50 in male mice (mg/kg): 11 i.v.; 43 i.p.; 30 s.c.; 330 orally (Kumada).
Melting point: mp 216-218°
Boiling point: (Free base, bp0.15 183-185°)
Toxicity data: LD50 in male mice (mg/kg): 11 i.v.; 43 i.p.; 30 s.c.; 330 orally (Kumada)
Therap-Cat: Antispasmodic.
Keywords: Antispasmodic; Antimuscarinic.

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