| abstract |
The present invention provides a pharmaceutical composition containing a PDE-5 inhibitor useful for the treatment of hypertension and other diseases. A compound of formula (I) is contained. [Wherein R1 is an optionally substituted cyclic group; R2 is C1-C2 alkyl, etc .; R3 and R4 are C1-C8 alkyl, etc .; or -NR3R4 forms a cyclic group] R5 is optionally substituted C1-C6 alkyl and the like; R6 is C1-C6 alkyl optionally substituted by a substituent and a cyclic group. ] [Selection figure] None |