C([O:3][C:4]([CH:6]([NH:15][CH:16]1[CH2:22][S:21][CH:20]([C:23]2[O:24][CH:25]=[CH:26][CH:27]=2)[CH2:19][N:18]([CH2:28][C:29]([OH:31])=[O:30])[C:17]1=[O:32])[CH2:7][CH2:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1)=[O:5])C.[OH-].[Na+]>>[C:4]([CH:6]([NH:15][CH:16]1[CH2:22][S:21][CH:20]([C:23]2[O:24][CH:25]=[CH:26][CH:27]=2)[CH2:19][N:18]([CH2:28][C:29]([OH:31])=[O:30])[C:17]1=[O:32])[CH2:7][CH2:8][C:9]1[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=1)([OH:5])=[O:3]Following the procedure described in Example 44, 130 mg of α-[6-(1-ethoxycarbonyl-3-phenylpropylamino)-2-(2-furyl)-5-oxoperhydro-1,4-thiazepin-4-yl]acetic acid (prepared as described in Example 57 above) were hydrolyzed with sodium hydroxide, to afford 87 mg of the title compound as a powder.
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