Patent ID: 8580788

Claim:
A compound of formula I: wherein: R 1 is —C(═O)NR 6 R 7 ; R 2 and R 3 are each independently alkyl or alkenyl; R 4 is H, alkyl, cycloalkyl, cycloalkylalkyl, aryl, heteroaryl, aralkyl, alkylaralkyl, or heteroarylalkyl; X is NR 5 ; R 5 is —C(═O)R 8b ; R 6 is H, alkyl, cycloalkyl, alkylcycloalkyl, or aralkyl; R 7 is H, alkyl, aralkyl, or aryl; R 8b is H, alkyl, cycloalkyl, cycloalkylalkyl, heteroaryl, heteroarylalkyl, aralkyl, or aryl; m is 1; and n is 1, or a pharmaceutically acceptable salt thereof.