Patent ID: 6180665
Filing Date: 2001-01-30
Classification: A61P,C07C

Abstract:
A crystalline, .alpha.-polymorphic form of a compound of the formula: ##STR8##characterised by an infra-red spectrum as a mull in nujol which shows absorption bands at .nu.=3407, 3386, 3223, 3153, 1699, 1652, 1626, 1594, 1516, 1457 (nujol), 1377 (nujol), 1344, 1334, 1317, 1267, 1241, 1228, 1210, 1164, 1151, 1137, 1118, 1109, 1093, 1074, 1045, 1019, 1003, 981, 965, 911, 897, 862, 818, 800, 778, 762, 721 and 655 cm.sup.-1.