Patent ID: 7141560

Claim:
An alanine 2,6-dialkoxyphenyl ester derivative having the general formula I wherein R 1 is (C 1-3 )alkyloxy, (C 1-3 )alkyloxy(C 1-3 )alkyl, (C 1-3 )alkylthio, (C 1-3 )alkylthio(C 1-3 )alkyl, (C 1-3 )alkylsulfinyl, (C 1-3 )alkylsulfinyl(C 1-3 )alkyl, (C 1-3 )alkylsulfonyl, (C 1-3 )alkylsulfonyl(C 1-3 )alkyl, (C 1-3 )alkyloxycarbonyl, (CH 2 ) n —CO—NR 8 R 9 or (CH 2 ) n —NR 8 R 9 ; n is 0, 1 or 2; R 2 is hydrogen or (C 1-3 )alkyl; R 3 is (C 1-3 )alkyl or (C 1-3 )alkyloxy(C 1-3 )alkyl; R 4 is (C 1-3 )alkyloxy(C 1-3 )alkyl; or R 3 and R 4 form together with the nitrogen atom to which they are bound a 5-, 6-, or 7-membered ring, optionally containing a further heteroatom selected from O and S, and which ring may optionally contain a double bond and be optionally substituted with (C 1-3 )alkyl or (C 1-3 )alkyloxy; R 5 and R 6 are independently (C 1-3 )alkyl; R 7 is hydrogen, (C 1-3 )alkyl, (C 1-3 )alkyloxy or (C 2-3 )alkenyl; R 8 and R 9 are independently (C 1-3 )alkyl; or R 8 and R 9 form together with the nitrogen atom to which they are bound a 5-, 6-, or 7-membered, optionally containing a further heteroatom selected from O and S, and which ring may optionally contain a double bond; or a pharmaceutically acceptable salt thereof.