| 921228-73-1 | Phosphonic acid, P-[1-hydroxy-2,5-dioxo-3-(phenylmethyl)-3-pyrrolidinyl]-, dimethyl ester | C13H16NO6P |
| 921228-74-2 | Phosphonic acid, P-[3-[(4-fluorophenyl)methyl]-1-hydroxy-2,5-dioxo-3-pyrrolidinyl]-, bis(1-methylethyl) ester | C17H23FNO6P |
| 921228-82-2 | Phosphonic acid, P-[2,5-dioxo-1-(phenylmethoxy)-3-(phenylmethyl)-3-pyrrolidinyl]-, compd. with 2-aminoethanol (1:1) | C18H18NO6P.C2H7NO |
| 921228-84-4 | Phosphonic acid, P-[3-[(4-fluorophenyl)methyl]-2,5-dioxo-1-(phenylmethoxy)-3-pyrrolidinyl] -, compd. with 2-aminoethanol (1:1) | C18H17FNO6P.C2H7NO |