BOC-L-ORN(4S-OTIPS, 5-Z)-OH

(2S,4S)-5-BENZYLOXYCARBONYLAMINO-2-T-BUTOXYCARBONYLAMINO-4-TRIISOPROPYLSILANYLOXY-PENTANOIC ACID

(2S,4S)-5-BENZYLOXYCARBONYLAMINO-2-TERT-BUTOXYCARBONYLAMINO-4-TRIISOPROPYLSILANYLOXY-PENTANOIC ACID