Pacritinib is an azamacrocycle with formula C28H32N4O3. It is a Janus kinase inhibitor and its citrate salt is approved for the treatment of intermediate or high risk, primary or secondary myelofibrosis. It has a role as an EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor, an antineoplastic agent, an apoptosis inducer and an anti-inflammatory agent. It is an azamacrocycle, a member of pyrrolidines, a cyclic ether and a member of benzenes. It is a conjugate base of a pacritinib(1+).