155550-31-5Relevant articles and documents
3-(7'-oxo-1'-aza-4'-oxabicyclo[3.2.0]-hept-3'-YL)propionic acid derivative as antitumor agent
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, (2008/06/13)
A derivative of 3-(7'-oxo-1'-aza-4'-oxabicyclo[3.2.0 ]hept-3'-yl)propionic acid represented by the formula STR1 wherein R1 is a hydrogen atom, a lower alkyl group optionally having one or more cycloalkyl groups, a lower acyl group, a benzoyl group optionally having one or more substituents or a benzyl group optionally having one or more substituents, R2 is a hydrogen atom or a carboxyl-protecting group, R3 is a hydroxyl group, an azido group, a benzenesulfonyloxy group optionally having one or more substituents, a lower alkylsulfonyloxy group optionally having one or more substituents, a tri-substituted silyloxy group or an amino group optionally having one or more substituents, provided that when R1 and R2 are hydrogen atoms, R3 is not an amino group, and a salt thereof.