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(2007/10/02)(S)-2-(11,13-Dioxo-12-aza-tricyclo[4.4.3.01,6]trideca-3,8-dien-12-yl)-propionic acid
t-Butyl 11',13'-dioxo-12'-aza<4.4.3>propella-3',8'-diene-12'-(2S)-propionate
Bicyclo<4.4.0>deca-3,8-dien-1,6-dicarbonsaeureanhydrid
4-Phenyl-1,2,4-triazolidine-3,5-dione
t-Butyl 11',13'-dioxo-12'-aza<4.4.3>propella-2',4',7',9'-tetraene-12'-(2S)-propionate