Crystal structure of tetraaquabis(pyridine-4-carboxamide-N)zinc(II) 1,5-naphthalenedisulfonate — isonicotinamide — water (1:2:4), [Zn(H2O)4(C6H6N2O)2][C10H6S2O6] · 2C6H6N2O · 4H2O - Zhao Ning; Lian Zhaoxun; Liu Ping (Zeitschrift für Kristallographie - New Crystal Structures, 2010)