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(2007/10/02)[(2R,6R)-5-Oxo-2-thiophen-2-yl-6-(trityl-amino)-[1,4]thiazepan-4-yl]-acetic acid tert-butyl ester
((2R,6R)-6-tert-Butoxycarbonylamino-5-oxo-2-thiophen-2-yl-[1,4]thiazepan-4-yl)-acetic acid tert-butyl ester
[(R)-5-Oxo-2-thiophen-2-yl-6-(trityl-amino)-6,7-dihydro-5H-[1,4]thiazepin-4-yl]-acetic acid tert-butyl ester
(2R,6R)-2-Thiophen-2-yl-6-(trityl-amino)-[1,4]thiazepan-5-one
((2R,6R)-6-tert-Butoxycarbonylamino-1,5-dioxo-2-thiophen-2-yl-1λ4-[1,4]thiazepan-4-yl)-acetic acid tert-butyl ester