Methotrexate analogs. 21. Selective cleavage of 2-(trimethylsilyl)ethyl esters in the presence of N-tert-butyloxycarbonyl groups during the synthesis of protected dilysine and trilysine derivatives of methotrexate
Methotrexate analogs. 21. Selective cleavage of 2-(trimethylsilyl)ethyl esters in the presence of N-tert-butyloxycarbonyl groups during the synthesis of protected dilysine and trilysine derivatives of methotrexate