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main nucleus of carumonam

(2S)-3-amino-2-[(aminocarbonyl) )oxy]methyl -4-oxo-1-azetidine-

sulfonic acid

PHE

2-Pentenedioic acid, 2-[2-[[(phenylmethoxy)carbonyl]-

amino]-4-thiazolyl]-, 5-(3-methyl-2-buten-1-yl) ester

MFTA

4-Methyl-5-formylthiazole

BTPA、BAPA

(Z )-2-(2-t-Butoxycarbonylaminothiazol-4-yl)-2-pentenoic acid

EATA

Ethyl 2-(2-aminothiazol-4-yl) acetate

MATA

Methyl 2-(2-aminothiazol-4-yl) acetate\

ATAA

2-(2-Aminothiazol-4-yl) acetic acid

ATAH

2-(2-Aminothiazol-4-yl) acetic acid hydrochloride

EBTA

Ethyl 2-(2-benzyloxycarbonylaminothiazol-4-yl) acetate

MBTA

Methyl 2-(2-benzyloxycarbonylaminothiazol-4-yl) acetate

EFTA

Ethyl 2-(2-formylaminothiazol-4-yl) acetate

EFTG

Ethyl 2-(2-formylaminothiazol-4-yl) glyoxylate

EATH
Ethyl ( Z )-2-(2-aminothiazol-4-yl)-2-hydroxyiminoacetate

ATHA

( Z )-2-(2-Aminothiazol-4-yl)-2-hydroxyiminoacetic acid

TBCA

( Z )-2-(2-Aminothiazol-4-yl)-2-(t-butoxycarbonylmethoxyimino)acetic acid