Ucb-L 057102849-49-0100 % similar Levetiracetam acid103833-72-3100 % similar Levetiracetam102767-28-268 % similar α-Ethyl-2-oxo-1-pyrrolidineacetamide33996-58-668 % similar 1-(2-Chloroacetyl)-L-proline23500-10-951 % similar Glycyl-L-proline704-15-450 % similar Ac-dl-pro-oh1074-79-945 % similar N-Acetyl-L-proline68-95-145 % similar N-Cyclohexyl-2-pyrrolidone6837-24-743 % similar L-Alanyl-L-proline13485-59-143 % similar Sepilift dphp41672-81-543 % similar 2-Methylbutanoic acid116-53-043 % similar (+)-2-Methylbutanoic acid1730-91-243 % similar 2-Methylbutanoic acid600-07-743 % similar Captopril62571-86-241 % similar Ethylmalonic acid601-75-241 % similar 2-Ethylbutanoic acid88-09-541 % similar 2-Ethylhexanoic acid149-57-541 % similar N-Methyl-L-proline475-11-641 % similar N-Methyl-D-pipecolic acid41447-17-040 % similar