Clinical data
Trade names Cymerin
AHFS/Drugs.com International Drug Names
Routes of
ATC code L01AD07 (WHO)
Legal status
Legal status
  • ℞ (Prescription only)
Synonyms 1-(2-chloroethyl)-1-nitroso-3-([(2R,3S,4S,5R,6S)-3,4,5-trihydroxy-6-methoxyoxan-2-yl]methyl)urea
CAS Number 58994-96-0 YesY
PubChem (CID) 71741
ChemSpider 64785
Chemical and physical data
Formula C10H18ClN3O7
Molar mass 327.71 g/mol
3D model (Jmol) Interactive image

Ranimustine (INN, marketed under the tradename Cymerin; also known as MCNU) is a nitrosourea alkylating agent approved in Japan for the treatment of chronic myelogenous leukemia[1] and polycythemia vera.[2]

It has never been filed for FDA evaluation in the United States, where it is not marketed.


  1. Kitajima K, Adachi T, Takahashi I, et al. (November 1989). "[Chemotherapy of chronic myelogenous leukemia--VP(M) regimen initiated during its chronic phase, and evaluation of MCNU in the phase of blastic crisis]". Gan To Kagaku Ryoho (in Japanese). 16 (11): 3573–9. PMID 2817908.
  2. Nagai M, Tasaka T, Kamano H, et al. (December 1988). "[Therapeutic effect of ranimustine (MCNU) on essential thrombocythemia and polycythemia vera]". Gan To Kagaku Ryoho (in Japanese). 15 (12): 3267–70. PMID 3196045.
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