p. 4504 - 4517
(2008)2-{3-[5-[7-(2,5-dioxopyrrolidin-1-yloxycarbonyl)heptanoylamino]-1-(4-methoxybenzyloxycarbonyl)pentyl]ureido}pentanedioic acid bis-(4-methoxybenzyl) ester
C43H48(125)IN3O11
C42H47(125)IN4O11
2-[3-[5-(4-iodo-benzoylamino)-1-(4-methoxy-benzyloxycarbonyl)-pentyl]-ureido]-pentanedioic acid bis-(4-methoxybenzyl)ester
2-[3-[5-(4-fluoro-benzoylamino)-1-(4-methoxy-benzyloxycarbonyl)-pentyl]-ureido]-pentanedioic acid bis-(4-methoxy-benzyl)ester