Fig. 2From: Effect of the versatile bifunctional chelator AAZTA5 on the radiometal labelling properties and the in vitro performance of a gastrin releasing peptide receptor antagonistSynthetic scheme of AAZTA5-(tBu)4: a paraformaldehyde, MeOH, Amberlyst A21; b Pd (OH)2/C, CH3COOH, EtOH, K2CO3; c tert-butylbromacetate, MeCN, K2CO3, KI; d 1 M LiOH, 1,4-dioxane/H2O (2:1)Back to article page