Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The title compounds have been synthesised by the α-ureidoalkylation of (S)-N-carbamoyl-α-amino acids with 1,3-dimethyl- and 1,3-dimethyl-4,5-diphenyl-4,5-dihydroxyimidazolidin-2-ones. ... OV Lebedev, LI Khmel'nitskii, LV Epishina, LI Suvorova, IV Zaikonnikova, IE Zimakova, ...