(S)-2-Cyclohexylmethanesulfonylamino-9-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-nonanoic acid isopropyl ester
(S)-2-Cyclohexanesulfonylamino-9-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-nonanoic acid isopropyl ester
(S)-3-[(S)-2-Azido-9-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-nonanoyl]-4-benzyl-oxazolidin-2-one
(S)-2-Benzyloxycarbonylamino-9-(5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl)-nonanoic acid isopropyl ester
(S)-4-Benzyl-3-(9-5,6,7,8-tetrahydro-[1,8]naphthyridin-2-yl-nonanoyl)-oxazolidin-2-one