Diethyl Ether → HCID 131724976, compound

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10-(5-Chloro-4-cyclohex-1-en-1-yl-2-methoxybenzoyl)-N-methyl-N-(pyridin-3-ylmethyl)-10,11-dihydro-5H-pyrrolo[2,1- c][1,4]benzodiazepine-3-carboxamide of Example 1 (0.200 g, 0.344 mmol), was dissolved in boiling diethyl ether. A solution of L-(+)-tartaric acid (0.0520 g, 0.344 mmol) in hot methanol (1 mL) was added, the mixture cooled and solvent evaporated. Diethyl ether was added to the residue causing a white solid to form which was filtered and dried in vacuo to provide 0.252 g of the title compound tartaric acid salt, m.p. 138-177° C.

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