AgC4N4H5O3 crystallizes in the monoclinic P2_1/c space group. Ag(1) is bonded in a 6-coordinate geometry to one N(1), one N(3), one O(2), one O(3), and two equivalent O(1) atoms. The Ag(1)-N(1) bond length is 2.24 Å. The Ag(1)-N(3) bond length is 2.27 Å. The Ag(1)-O(2) bond length is 2.58 Å. The Ag(1)-O(3) bond length is 2.71 Å. There is one shorter (2.73 Å) and one longer (2.79 Å) Ag(1)-O(1) bond length. There are four inequivalent C sites. In the first C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(3), and one H(5) atom. The C(3)-C(2) bond length is 1.39 Å. The C(3)-N(3) bond length is 1.34 Å. The C(3)-H(5) bond length is 1.09 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one N(1), one N(2), and one N(3) atom. The C(4)-N(1) bond length is 1.37 Å. The C(4)-N(2) bond length is 1.34 Å. The C(4)-N(3) bond length is 1.36 Å. In the third C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(3) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(3) bond length is 1.09 Å. In the fourth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(4) atom. The C(2)-H(4) bond length is 1.09 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Ag(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(4), one H(1), and one H(2) atom. The N(2)-H(1) bond length is 1.02 Å. The N(2)-H(2) bond length is 1.03 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Ag(1), one C(3), and one C(4) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The N(4)-O(1) bond length is 1.26 Å. The N(4)-O(2) bond length is 1.28 Å. The N(4)-O(3) bond length is 1.27 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(3) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a single-bond geometry to one Ag(1) and one N(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Ag(1) and one N(4) atom. In the third O site, O(1) is bonded in a single-bond geometry to two equivalent Ag(1) and one N(4) atom. Linkers: 4 Nc1ncccn1. Metal clusters: 4 [Ag]. The MOF has largest included sphere 1.38 A, density 2.51 g/cm3, surface area 2986.23 m2/g, accessible volume 0.06 cm3/g