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