| abstract |
Compounds of the general formula (1), salts thereof and their hydrates. (1) In the formula, each of R1a, R1b, R1c and R1d independently is a hydrogen atom, etc. R2 is an optionally substituted phenyl, etc. R3 is an optionally substituted C6-10 aryl, etc. Each of Z1 and Z2 independently is a hydrogen atom. They are useful as a therapeutic agent and/or preventive for diseases caused by clot formation, being safer, and have appropriate physicochemical stability. |