The chemical structure that was submitted to the WHO for the INN itacnosertib is identical to the structure of example 11 that is claimed in Tolero Pharmaceuticals' patent WO2014151871A9 [1
]. The INN submission declares itacnosertib as a 'serine/threonine kinase inhibitor'. Data presented in WO2014151871A9 provide evidence of example 11's activity as an inhibitor of the activin A receptor type 1 (ACVR1
; a.k.a. ALK2) which is a Type I receptor serine/threonine kinase. Tolero have declared an ACVR1-targeting oncology programme on their pipeline webpage. The research code provided is TP-0184, but to date (Dec 2020) there has been no formal name>structure disclosure for this compound.