Patent ID: 8912178

Claim:
A compound of Formula II: or a salt thereof; wherein X is CH; R 1 is 1 ) heterocyclyl optionally substituted with C(O)OR 15 , C(O)R 16 , or S(O) 2 R 17 ; or 2) cycloalkyl optionally substituted with OH, C(O)OR 15 , or R 17 ; R 2 is hydrogen or alkyl; R 3 is hydrogen; each R 4 is independently 1) alkyl; or 2) aryl optionally substituted with R 16 or C(O)R 16 ; R 5 is hydrogen; or each R 2 and R 5 together with the atom(s) that each is respectively attached to can form a cyclo or heterocyclo structure; R 15 is hydrogen or C 1 -C 4 alkyl; R 16 is heterocyclyl or C 1 -C 4 alkyl, wherein each of said heterocyclyl or C 1 -C 4 alkyl is independently optionally substituted with OH, halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, or NH 2 ; and R 17 is C 1 -C 4 alkyl optionally substituted with OH.