(1,7,13-Trioxa-4,10,16-triazacyclooctadecane-4,10,16-triacetato(3-)-N4,N10,N16,O1,O4,O7,O10,O13,O16)gadolinium 129964-84-7 Gadolinium, (1,7,13-trioxa-4,10,16-triazacyclooctadecane-4,10,16-triacetato(3-)-N4,N10,N16,O1,O4,O7,O10,O13,O16)- Gadolinium-1,7,13-triaza-4,10,16-trioxacyclooctadecane-N,N',N''-triacetic acid Gd(Ttct)