RESIDUE K7E 7 CONECT CU1 1 S1 CONECT CU2 1 S1 CONECT CU3 1 S1 CONECT CU4 2 S1 S2 CONECT S1 4 CU1 CU2 CU3 CU4 CONECT S2 2 CU4 H1 CONECT H1 1 S2 END HET K7E 7 HETNAM K7E sulfanyl-(tricuprio-$l^{4}-sulfanyl)copper FORMUL K7E Cu4 H1 S2