A compound useful as an A1 adenosine receptor antagonist has formula (I), wherein R1 is selected from the group consisting of C1-C8alkyl; R2 is of formula (II), wherein n is an integer ranging from 1 to 8; R5 is H or CH3(CH2)p, wherein p is an integer ranging from 1 to 7; and R6 is H; (CH2)mH; or (CH2)mOH, wherein m is an integer ranging from 1 to 8; R3 is selected from the group consisting of: (a), (b), (c) and (d), wherein q is an integer ranging from 1 to 8; D is selected from the group consisting of NH, S, and O; wherein R7 is selected from the group consisting of H, OH, NH2, R9COOH, wherein R9 is an alkylene or alkenylene group having 1 to 8 carbon atoms, and (CH2)tOH, wherein t is an integer ranging from 1 to 8; R11 is selected from the group consisting of -CH2COOH and -CH2-CONH(CH2)wNHZ, wherein w is an integer ranging from 1 to 2 and Z is selected from the group consisting of hydrogen and acetate; and R4 is of formula (III), wherein R8 is selected from the group consisting of H; OH; (CH2)fNH2 wherein f is selected from the group consisting of 0 and an integer ranging from 1 to 8; (CH2)5OH, wherein s is an integer ranging from 1 to 8; and R10COOH, wherein R10 is an alkylene or alkenylene group having 1 to 8 carbon atoms; and r is an integer ranging from 1 to 8.