2WXV:
reference: Identification of Potent Pyrazolo[4,3-h]quinazoline-3-carboxamides as Multi-Cyclin-Dependent Kinase Inhibitors (dagger)., Traquandi G, Ciomei M, Ballinari D, Casale E, Colombo N, Croci V, Fiorentini F, Isacchi A, Longo A, Mercurio C, Panzeri A, Pastori W, Pevarello P, Volpi D, Roussel P, Vulpetti A, Brasca MG, J Med Chem. 2010 Feb 8. PMID: 20141146

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).