[C:1]([C:3]1[C:8]2[CH2:9][C:10](=O)[C:11]3[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[CH:14][C:12]=3[S:13][C:7]=2[CH:6]=[CH:5][CH:4]=1)#[N:2].O.[NH2:22][NH2:23]>C(O)C.O1CCOCC1>[C:1]([C:3]1[C:8]2[CH2:9][C:10](=[N:22][NH2:23])[C:11]3[CH:17]=[C:16]([O:18][CH3:19])[CH:15]=[CH:14][C:12]=3[S:13][C:7]=2[CH:6]=[CH:5][CH:4]=1)#[N:2]900mg of 9-cyano-2-methoxy-10,11-dihydro-11-oxo-dibenzo-[b,f]thiepin was dissolved in the mixed solvent of 8ml of ethanol and 8ml of dioxane. To this was added 1.0g of 100% hydrazine hydrate and the resulting mixture was refluxed with stirring for 7.5 hours. After the completion of reaction, the solvent was distilled off to obtain the residue, which was washed with a small amount of ethanol, and there was obtained 750mg of 9-cyano-2-methoxy-10,11-dihydro-11-oxo-dibenzo[b,f]thiepin hydrazone as colorless needles having a melting point of 186°-187° C.
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