Cannabinergic nitrate esters and related analogs

A compound of formula (IIa):

• or a pharmaceutically acceptable salt thereof;
• wherein:
• ring C is carbocyclic, bicyclic, aryl, heterocyclyl, heteroaryl, or a terpene;
• G is a bond, C═O, NH, CH2, CONN, NHCO, C(O)O, OC(O), OCH2, S, SO, SO2, or O;
• ring A is:
• R2a and R2b are each independently H, OH, SH, NH2, CF3, COOH, alkoxy, halogen, ONO2, alkyl-ONO2, or optionally substituted alkyl, haloalkyl, amine, amide, imide, alkoxy, alkoxy thio, phosphate, phosphonate, carboxyl, formyl, carbamyl, amino, acylamino, amido, imido, aminoalkyl, aminoaryl, heteroarylamino, heterocyclylamino, sulfonate, sulfonamide, sulfonyl, thioalkyl, thioaryl, heteroarylthio, heterocyclylthio, phosphonate, phosphate, or acetate;
• Y is a bond;
• and
• R3 is alkyl,
• wherein the carbocyclic, bicyclic, aryl, heterocyclyl, or heteroaryl Ring C is optionally substituted with one or more substituents selected from alkyl, alkynyl, alkenyl, alcohol, halogen, hydroxyl, alkoxy, alkenoxy, alkynoxy, aryloxy, aralkyloxy, heterocyclyloxy, heterocyclylalkoxy, oxo, carboxyl, ester, urethane, oxime, hydroxylamine, alkoxyamine, aralkoxyamine, thiol, sulfide, sulfoxide, sulfone, sulfonyl, sulfonamide, amine, N-oxide, hydrazine, hydrazide, hydrazine, azide, amide, urea, amidine, guanidine, enamine, imide, isocyanate, isothiocyanate, cyanate, thiocyanate, imine, nitro, or nitrile.