abstract |
ABSTRACT The present invention is directed to pharmaceutically acceptable crystalline addition salts of 2-amino-1-hydroxyethyl-8-hydroxyquinolin-2(1H)-one derivatives of formula (l) or pharmaceutically acceptable solvates thereof: OH V, R6 HO HN M Formula (l) The provided pharmaceutically acceptable crystalline addition salts are stable, and have relatively high melting point. CPST Doc: 260697.1 Date Recue/Date Received 2020-06-05 |