1,7-Bis(1,1-dimethylethyl) 4,10-bis(6-hydroxy-2,2-dimethyl-1,3-dioxepan-5-yl)-1,4,7,10-tetraazacyclododecane-1,7-diacetate

1,7-Bis(1,1-dimethylethyl) 4,10-bis(6-hydroxy-2,2-dimethyl-1,3-dioxepan-5-yl)-1,4,7,10-tetraazacyclododecane-1,7-diacetate