A NOVEL ORGANIC AMINE SALT OR SALT WITH QUATERNARY AMMONIUM ION OF 3-{[((2E) - 2-(1 - [5-(4-T-BUTYLPHENYL)-4-HYD ROXY-3- THIENYL] ETHYLIDENE} HYDRAZINE) CARBONOTHIOYL] AMINO} BENZOIC ACID HAVING USEFUL PROPERTIES AS A DRUG IS PROVIDED. A NOVEL ORGANIC AMINE OR SALT WITH QUATERNARY AMMONIUM ION OF 3-{[((2E)-2-(1-[5-(4-T-BUTYLPHENYL)-4-HYDROXY-3-THIENYL] ETHYLIDENE} HYDRAZINO) CARBONOTHIOYL] AMINO) BENZOIC ACID, A METHOD FOR PRODUCING THE ORGANIC AMINE SALT OR THE SALT WITH QUATERNARY AMMONIUM ION AND A PLATELET INCREASING AGENT.