CH9911511Tetraazacycloalkanes With Pendant Carboxylates. Copper(II)-Directed Syntheses and Crystal Structure of (Ethyl 1,5,9,13-tetraazabicyclo[11.2.2]heptadecane-7-carboxylate)copper(II) Perchlorate
GA Lawrance, BW Skelton, AH White and EN Wilkes
pp. 1511-1522