Patent ID: 7138404

Claim:
A compound of formula I wherein R 1 is selected from the group consisting of C 2 –C 6 -alkenyl, C 2 –C 6 -alkinyl, C 3 –C 6 -unsubstituted cycloalkyl, —C(O)O—(C 1 –C 6 )-alkyl, —C(O)O—(C 2 –C 6 )-alkenyl, —C(O)O—(C 2 –C 6 )-alkinyl, —C(O)O—(C 3 –C 6 )-unsubstituted cycloalkyl —C(O)O—CH 2 -unsubstituted (C 3 –C 6 )-cycloalkyl, —C(O)O—(C 3 –C 6 )-cycloalkyl substituted by at least one unsubstituted heteroaryl, —C(O)O—CH 2 —(C 3 –C 6 )-cycloalkyl substituted by at least one unsubstituted heteroaryl, and —C(O)O—CH 2 -heteroaryl substituted by a substituent selected from the group consisting of at least one C 1 –C 6 -alkyl, unsubstituted heteroaryl, and heteroaryl substituted by at least one substituent selected from the group consisting of C 1 –C 6 -alkyl, C 2 –C 6 -alkenyl, C 2 –C 6 -alkinyl, C 3 –C 6 -cycloalkyl and halogen; R 2 selected group is from the consisting of hydrogen and C 1 –C 6 -alkyl; R 3 is unsubstituted heteroaryl or heteroaryl substituted by at least one substituent selected from the group selected from C 1 –C 6 -alkyl, C 2 –C 6 -alkenyl, C 2 –C 6 -alkinyl, C 3 –C 6 -cycloalkyl, halogen and cyano; R 4 is selected from the group consisting of hydrogen and C 1 –C 6 -alkyl; and m is 0, 1 or 2; or a pharmaceutically acceptable salt thereof.