Crystal data, data collection and structure refinement details are summarized in Table 2 ▸. H atoms of the water mol­ecules and the NH group were located in a difference-Fourier map and refined freely [refined distances; O—H = 0.70 (5)–0.91 (6) Å and N—H = 0.93 (4) Å]. Other H atoms were positioned geometrically and refined using a riding model, with C—H = 0.93 Å, and with U iso(H) = 1.2U eq(C).