Disclosed herein are novel prostaglandin I.sub.2 (PGI.sub.2) derivatives exhibiting excellent in vivo duration and activities, said derivatives being represented by the general formula: ##STR1## wherein R.sub.1, X, R.sub.2 and R.sub.3 are as defined herein.
Disclosed herein are novel prostaglandin I2 (PGI2) derivatives exhibiting excellent in vivo duration and acitivities, said derivatives being represented by the general formula:
wherein R1, X, R2 and R3 are as defined herein.
Disclosed herein are novel prostaglandin I2 (PGI2) derivatives exhibiting excellent physiological activities, said derivatives being represented by the general formula:
wherein R1, R2 and R3 are as defined herein.