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- [1] INVESTIGATIONS IN FIELD OF CHEMISTRY OF CYANIN E DYES .18. CONDENSATION OF AROMATIC AND ALICYCLIC KETONES WITH QUATERNARY SALTS OF 2-METHYLBENZOTHIAZOLE, AND CONVERSION OF RESULTING COMPOUNDS INTO CYANINE DYES JOURNAL OF GENERAL CHEMISTRY USSR, 1961, 31 (09): : 2673 - &