New compounds are disclosed which have utility in the treatment of a variety of metabolic related conditions in a patient. The compounds of this invention have the structure (I): wherein X1, X2, X3, X4, Y1, Y2, A, R1, R2, R3, R4, m, n, p, and q are as defined herein, including stereoisomers, esters, and pharmaceutically acceptable salts thereof. Also disclosed are compositions containing a compound of this invention in combination with a pharmaceutically acceptable carrier, as well as methods relating to the use thereof in a patient in need thereof.