abstract |
The present invention relates to (R) - (+) - N - [[3- [1-benzoyl- 3- (3,4- dichlorophenyl) piperidin- (4-phenylpiperidin-4-yl) -N-methylacetamide (osanetan) and the organotin of the above formulas I and II.n n n Preferably, the organotin to be crystallized is prepared from the benzenesulfonate. |