The present invention is concerned with alkylcyclohexylethers of dihydro-tetraazabenzoazulenes, i.e. alkylcyclohexylethers of 5,6-dihydro-4H-2,3,5,10b-tetraaza-benzo[e]azulene s of formula I wherein R1, R2 and R3 are as described herein, their manufacture, and pharmaceutical compositions containing them. The compounds according to the invention act as V1a receptor modulators, and in particular as V1a receptor antagonists. The compounds are useful as therapeutics acting peripherally and centrally in the conditions of dysmenorrhea, male or female sexual dysfunction, hypertension, chronic heart failure, inappropriate secretion of vasopressin, liver cirrhosis, nephrotic syndrome, anxiety, depressive disorders, obsessive compulsive disorder, autistic spectrum disorders, schizophrenia, and aggressive behavior.
