Gadolinium, aqua[rel-(5R,11S)-5,8-bis[(carboxy-κO)methyl]-11-[2-(methylamino)-2-(oxo-κO)ethyl]-3-(oxo-κO)-2,5,8,11-tetraazatridecan-13-oato(3-)-κN⁵,κN⁸,κN¹¹,κO¹³]-, hydrate (1:?), (TPS-9-156428397)-