(3R,4R,5S)-ethyl 4-acetamido-5-[(tert-butoxycarbonyl)amino]-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
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ethyl (3R,4R,5S)-3-(1-ethyl-propoxy)-4-acetamido-5-tert-butoxycarbonylamino-cyclohex-1-ene-1-carboxylate
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(3R,4R,5S)-ethyl 4-acetamido-5-((tert-butoxycarbonyl)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
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ethyl (3R,4R,5S)-3-(1-ethyl-propoxy)-4-acetamido-5-tert-butoxycarbonylaminocyclohex-1-ene-1-carboxylate
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(3R,4R,5S)-ethyl 4-acetamido-5-(tert-butoxycarbonylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
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(3R,4R,5S)-4-acetylamino-5-tert-butoxycarbonylamino-3-(1-ethylpropoxy)cyclohex-1-enecarboxylic acid ethyl ester
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