A thermoformable dual network hydrogel composition formed from a cross-linked polymer derived from one or more olefinically unsaturated polymerizable carboxylic monomers and one or more thermoplastic polyurethane compositions is disclosed. The hydrogel exhibits high elastic modulus and Yield Stress at low shear, and a moderate but significant adhesion force. The hydrogel composition provides useful materials for personal care, health care, medical and pharmaceutical applications, among others.
Novel steroid 5.alpha.-reductase inhibitors
申请人:Richardson-Merrell Inc.
公开号:US04317817A1
公开(公告)日:1982-03-02
Compounds of the following general formula are testosterone 5.alpha.-reductase inhibitors rendering the compounds useful in the treatment of acne and oily skin and benign prostatic hypertrophy: ##STR1## wherein R is: .dbd.O, --OH, --OCO--alkyl C.sub.1-5, --COOH, --CH.sub.2 OH, --COO--alkyl C.sub.1-6, --COCH.sub.3, ##STR2##