The invention relates to 3-[2-(2′,4′-difluoro-4-biphenylyloxy)-ethyl]-4-[3H]-quinazolinone and its acid addition salts, particularly the hydrochloride, to a process for preparing these compounds and intermediates thereof, and to pharmaceutical compositions comprising these compounds as active ingredients. The ether derivative of 4-[3H]-quinazolinone according to the invention possesses considerably higher analgesic activity and lower acute toxicity than aminophenazone, ibuprofen, acetylosalicylic acid and paracetamol.
本发明涉及3-[2-(2′,4′-二
氟-4-
联苯氧基)-乙基]-4-[3H]-
喹唑啉酮及其酸加成盐,特别是盐酸盐,涉及制备这些化合物及其中间体的工艺,还涉及含有这些化合物作为活性成分的药物组合物。根据本发明,4-[3H]-
喹唑啉酮的醚衍
生物比
氨基比林、
布洛芬、乙酰
水杨酸和
扑热息痛具有更高的镇痛活性和更低的急性毒性。