| abstract |
A method of treating a patient susceptible to thrombosis is provided which comprises treating the said patient with a compound of the formula ##STR1## wherein R' is H or CH 3 n R is a ##STR2## radical in which Z is 0, S, SO, SO 2 or NR 1 , R 1 being H, C 6 H 5 , CH 3 , CONR 2 R 3 , COOR 2 , COR 2 or SO 2 R 2 , where R 2 and R 3 are, independently, H, C 1-4 alkyl, C 6 H 5 or CF 3 . |