The present invention provides compounds of the Formula I: wherein X is a bond or CH2; R is selected from the group consisting of R1 and R2 are each independently selected from the group consisting of CH and N; R3 is H or CH3; R4 is H or CH3; L is selected from the group consisting of —O(CH2)3—, —C(O)NH(CH2)2—, —CH2C(O)NH(CH2)2—, —(CH2)3N(C(O)CH3)CH2—, —(CH2)2N(C(O)CH3)CH2—, —(CH2)3NH—, (CH2)2OCH2—, —(CH2)4—, —(CH2)2NHCH2—, —(CH2)3O—, and —CH2O(CH2)2—; or a pharmaceutically acceptable salt thereof. Compounds of this invention are autotaxin inhibitors.