| 摘要 |
A compound of the formula: <IMAGE> wherein Z=H, halo, C1-C20 alkyl, cycloalkyl, lower alkoxy, alkoxycarbonyl, cyano, wherein thealkyl and cycloalkyl groups can be substituted with halogen or halo-lower-alkyl groups; R=C1-C25 alkyl, cycloalkyl, <IMAGE> or halo-lower-alkyl; each of which may be optionally substituted with halo, fluoro-lower-alkyl, aryl, lower-alkoxy, hydroxy, carboxy, lower-alkoxy carbonyl or lower-alkoxy-carbonyloxy, (CR1R2)p-(CR3=CR4)mQ, or (CR1R2)p-C 3BOND C-Q; R1, R2, R3 and R4 are independently H, or lower-alkyl, optionally substituted with halo; x is 1-4; n is [1-5]1-4; m is 1-15; p is 1-20; and Q is H, lower-alkyl, lower-alkenyl, lower-alkynyl, lower-alkylene, aryl, these compounds are useful as X-ray contrast agents or aryl-lower alkyl.
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