Coumarin derivatives, pharmaceutical compositions containing the same, and the use thereof in the treatment of cancer

摘要: A compound having the formula: wherein R 1 is naiogen or a substituted unsubstituted hydrocarbon group; 2 , 6 and 7 which may be same different, each represents hydrogen group, take together represent hetero group one more atoms; 3 4 different taken an alkylene atoms s hydrogen, halogen free protected hydroxy pharmaceutically acceptable salt thereof. The compounds have antiaggregating properties some of them also antitumor antimetastatic activity.