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methyl (4R,4'S,4''S,4'''S)-4,4',4'',4'''-tetramethyl-2'''-phenyl-4,4',4'',4''',5,5',5'',5'''-octahydro-[2,4':2',4'':2'',4'''-quaterthiazole]-4-carboxylate
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(4R,4'S,4''S,4'''S)-4,4',4'',4'''-tetramethyl-2'''-phenyl-4,4',4'',4''',5,5',5'',5'''-octahydro-[2,4':2',4'':2'',4'''-quaterthiazole]-4-carboxylic acid
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