Title: Cyclarbamate
CAS Registry Number: 5779-54-4
CAS Name: 1,1-Cyclopentanedimethanol bis(phenylcarbamate)
Additional Names: 1,1-cyclopentanedimethanol dicarbanilate; cyclopentane-1,1-dimethanol bis(phenylcarbamate); 1,1-dihydroxymethylcyclopentane N,N¢-diphenylcarbamate; cyclopentaphene
Manufacturers' Codes: BSM-906M
Trademarks: Calmalone (Cassenne)
Molecular Formula: C21H24N2O4
Molecular Weight: 368.43
Percent Composition: C 68.46%, H 6.57%, N 7.60%, O 17.37%
Literature References: Prepn: Bourdais, Bull. Soc. Chim. Fr. 1962, 266; E. Rosenberg, GB 904410 corresp to US 3067240 (both 1962 to Lab. Cassenne).
Properties: Needles from methanol, mp 151-152°. Practically insol in water. Slightly sol in alcohol, glycerol, propylene glycol.
Melting point: mp 151-152°
Therap-Cat: Anxiolytic; muscle relaxant (skeletal).
Status: This monograph has been retired and is no longer subject to revision or update.
Cyclethrin Cyclexanone Cyclexedrine Cyclizine Cyclobarbital

Systematic (IUPAC) name
cyclopentane-1,1-diyldimethanediyl bis(phenylcarbamate)
Clinical data
Legal status Prescription only
CAS number 5779-54-4
ATC code None
PubChem CID 72076
ChemSpider 65062
UNII 779291866J
Synonyms BSM-906M
Chemical data
Formula C21H24N2O4 
Mol. mass 368.426 g/mol

Cyclarbamate (INN; Casmalon), also known as cyclopentaphene, is a muscle relaxant and tranquilizer of the carbamate family which has been marketed by Cassenne in France since 1961.[1][2]