| abstract |
Disclosed are a compound as represented by formula (I), which is a condensation product of a theanine derivative and a carboxylic acid coumarin derivative, a compound as represented by formula (II), which is an intermediate of the condensation product, and a compound as represented by formula (III), a method for preparing these compounds, a pharmaceutical composition comprising the compounds, and a use thereof in preparing a medicament for prevention and treatment of tumors, cancers, cardiovascular and immune deficiency diseases. |