Patent Homogeneous catalytic system for hydrogenation of methylenetetracyclines and a process for the preparation of same Jan 01, 1989 US 4743699
Patent Rhodium-containing hydrogenation catalysts for the conversion of methacycline to doxycycline Jan 01, 1989 EP 283615
Patent Preparation and use of new solvates of beclomethasone 17,21-dipropionate Jan 01, 1986 EP 172672