p. 8979 - 8987
(2007/10/03)p. 3397 - 3398
(2007/10/03)1,4,7,10-tetraaza-cyclododecane-1,7-dicarboxylic acid dibenzyl ester
thiazolidine-2-thione
1,7-di(carboxymethyl)-4,10-di(benzyloxycarbonyl)-1,4,7,10-tetraazacyclododecane
1,7-Dicarboxymethyl-4,10-di(benzyloxycarbonyl)-1,4,7,10-tetrazacyclododecane