1	9S8	Non-cubane [4Fe-4S]-cluster	1.000
2	A1CBX	1,3,5,7-tetrathia-2$L^{2},4$L^{4},6$L^{2}-triferraspiro[3.3]heptane	0.875
3	SF3	Fe4-s3 cluster	0.875
4	ER2	Fe4s4	0.778
5	MSK	Broken Fe4S4 cluster	0.778
6	S3F	Oxidized [fe4-s3] cluster	0.778
7	8JU	Fe4-s4-O cluster	0.700
8	CUV	Fe(4)-ni(1)-S(4) cluster, oxidized	0.700
9	Q46	Fe4 H s5	0.700
10	RQM	Fe(3)-ni(1)-S(4) cluster	0.700
11	XCC	Fe(4)-ni(1)-S(4) cluster	0.700