1	GB	Methylphosphonic acid ester group	1.000
2	MMQ	Mercaptomethyl phosphonate	0.833
3	2PO	Phosphonate	0.800
4	78T	Oxidanylphosphinate	0.800
5	PHS	Phosphonic acid	0.800
6	PO3	Phosphite ion	0.800
7	VXA	Methylphosphonic acid ester group	0.800
8	2HE	(2-hydroxyethyl)phosphonic acid	0.714
9	57H	Prop-2-en-1-ylphosphonic acid	0.714
10	GG7	[(1r)-1-aminoethyl]phosphonic acid	0.714
11	P7I	(2-aminoethyl)phosphonic acid	0.714
12	POA	Phosphonoacetaldehyde	0.714
13	PPF	Phosphonoformic acid	0.714