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

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

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