The present invention provides 4-amino-6,7-dimethoxy-2-(5-methanesulfonamido-1,2,3,4-tetrahydroisoquinol-2-yl)-5-(2-pyridyl)quinazoline mesylate of the formula
1
together with processes for preparing, and compositions containing it.
The invention also relates to substantially pure anhydrous crystalline polymorphic forms of the free base.
The compounds are particularly useful in the treatment of benign prostatic hyperplasia.
本发明提供了式1的4-
氨基-6,7-二甲氧基-2-(5-甲磺酰胺基-1,2,3,4-
四氢异喹啉-2-基)-5-(2-
吡啶基)
喹唑啉甲磺酸盐,以及制备该化合物的方法和含有它的组合物。该发明还涉及自由碱的高度纯净无
水晶态多形形式。这些化合物在治疗良性前列腺增生方面特别有用。