This invention relates to compounds of the formula (I): or pharmaceutically acceptable salts thereof, wherein: A, B, R1, R2 and R3 are each as described herein, and compositions containing such compounds and the use of such compounds in the treatment of a condition mediated by CB2 receptor binding activity such as, but not limited to, inflammatory pain, nociceptive pain, neuropathic pain, fibromyalgia, chronic low back pain, visceral pain, acute cerebral ischemia, pain, chronic pain, acute pain, post herpetic neuralgia, neuropathies, neuralgia, diabetic neuropathy, HIV-related neuropathy, nerve injury, rheumatoid arthritic pain, osteoarthritic pain, back pain, cancer pain, dental pain, fibromyalgia, neuritis, sciatica, inflammation, neurodegenerative disease, cough, broncho constriction, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), colitis, cerebrovascular ischemia, emesis such as cancer chemotherapy-induced emesis, rheumatoid arthritis, asthma, Crohn's disease, ulcerative colitis, asthma, dermatitis, seasonal allergic rhinitis, gastroesophageal reflux disease (GERD), constipation, diarrhea, functional gastrointestinal disorder, cutaneous T cell lymphoma, multiple sclerosis, osteoarthritis, psoriasis, systemic lupus erythematosus, diabetes, glaucoma, osteoporosis, glomerulonephritis, renal ischemia, nephritis, hepatitis, cerebral stroke, vasculitis, myocardial infarction, cerebral ischemia, reversible airway obstruction, adult respiratory disease syndrome, chronic obstructive pulmonary disease (COPD), cryptogenic fibrosing alveolitis or bronchitis.