| (1-amino-2-carbamoylethylidene)di-phosphonic aci dihydrate |
| (1-amino-2-carbamoylethylidene)diphosphonic acid dihydrate |
| alpha-amino-beta-carboxamidoethylidene-alpha,alpha-diphosphonic acid dihydrat |
| (1,3-diamino-3-oxopropylidene)bis-phosphonic aci dihydrate |
| (1-amino-2-carbamoylethylidene)di-phosphonic acidihydrate |
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