Cd2C18N8H10O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(1), one N(6), one O(2), one O(4), one O(7), and two equivalent O(5) atoms to form CdN2O5 pentagonal bipyramids that share  a cornercorner with one Cd(2)N4O3 pentagonal bipyramid and  an edgeedge with one Cd(1)N2O5 pentagonal bipyramid. The Cd(1)-N(1) bond length is 2.28 Å. The Cd(1)-N(6) bond length is 2.46 Å. The Cd(1)-O(2) bond length is 2.51 Å. The Cd(1)-O(4) bond length is 2.39 Å. The Cd(1)-O(7) bond length is 2.34 Å. There is one shorter (2.46 Å) and one longer (2.51 Å) Cd(1)-O(5) bond length. In the second Cd site, Cd(2) is bonded to one N(2), one N(3), one N(5), one N(7), one O(1), one O(2), and one O(3) atom to form distorted corner-sharing CdN4O3 pentagonal bipyramids. The Cd(2)-N(2) bond length is 2.36 Å. The Cd(2)-N(3) bond length is 2.32 Å. The Cd(2)-N(5) bond length is 2.48 Å. The Cd(2)-N(7) bond length is 2.49 Å. The Cd(2)-O(1) bond length is 2.45 Å. The Cd(2)-O(2) bond length is 2.59 Å. The Cd(2)-O(3) bond length is 2.38 Å. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one N(1) atom. The C(1)-N(1) bond length is 1.34 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one H(3) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(3) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(7) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(4) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(8), and one N(1) atom. The C(5)-C(8) bond length is 1.53 Å. The C(5)-N(1) bond length is 1.34 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(3) atom. The C(6)-O(2) bond length is 1.28 Å. The C(6)-O(3) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(4), and one O(5) atom. The C(7)-O(4) bond length is 1.27 Å. The C(7)-O(5) bond length is 1.29 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(6), and one O(7) atom. The C(8)-O(6) bond length is 1.25 Å. The C(8)-O(7) bond length is 1.29 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(11), one N(2), and one N(4) atom. The C(9)-C(11) bond length is 1.45 Å. The C(9)-N(2) bond length is 1.35 Å. The C(9)-N(4) bond length is 1.35 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(15), one N(3), and one N(4) atom. The C(10)-C(15) bond length is 1.45 Å. The C(10)-N(3) bond length is 1.35 Å. The C(10)-N(4) bond length is 1.35 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(12), one C(9), and one N(5) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-N(5) bond length is 1.35 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(11), one N(6), and one H(5) atom. The C(12)-N(6) bond length is 1.34 Å. The C(12)-H(5) bond length is 1.09 Å. In the thirteenth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(14), one N(6), and one H(6) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-N(6) bond length is 1.34 Å. The C(13)-H(6) bond length is 1.09 Å. In the fourteenth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(13), one N(5), and one H(7) atom. The C(14)-N(5) bond length is 1.34 Å. The C(14)-H(7) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(10), one C(16), and one N(7) atom. The C(15)-C(16) bond length is 1.41 Å. The C(15)-N(7) bond length is 1.35 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(15), one N(8), and one H(8) atom. The C(16)-N(8) bond length is 1.34 Å. The C(16)-H(8) bond length is 1.09 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(18), one N(8), and one H(9) atom. The C(17)-C(18) bond length is 1.40 Å. The C(17)-N(8) bond length is 1.34 Å. The C(17)-H(9) bond length is 1.09 Å. In the eighteenth C site, C(18) is bonded in a distorted trigonal planar geometry to one C(17), one N(7), and one H(10) atom. The C(18)-N(7) bond length is 1.34 Å. The C(18)-H(10) bond length is 1.09 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a 3-coordinate geometry to one Cd(2), one C(9), and one N(3) atom. The N(2)-N(3) bond length is 1.34 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Cd(2), one C(10), and one N(2) atom. In the fourth N site, N(4) is bonded in a water-like geometry to one C(10) and one C(9) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(11), and one C(14) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(12), and one C(13) atom. In the seventh N site, N(7) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(15), and one C(18) atom. In the eighth N site, N(8) is bonded in a trigonal planar geometry to one C(16), one C(17), and one H(1) atom. The N(8)-H(1) bond length is 1.68 Å. There are ten inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one N(8) and one O(1) atom. The H(1)-O(1) bond length is 1.02 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(12) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(13) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(14) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(16) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(17) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(18) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Cd(2), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(6) atom. In the third O site, O(3) is bonded in a distorted L-shaped geometry to one Cd(2) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(8) atom. Linkers: 2 c1cnc(C2=NC(c3cnccn3)=N[N]2)cn1 ,2 [O]C(=O)c1cc(C([O])=O)nc(C([O])=O)c1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 3.24 A, density 2.07 g/cm3, surface area 3190.29 m2/g, accessible volume 0.13 cm3/g