5W6E:
reference: Discovery of Potent and Selective Periphery-Restricted Quinazoline Inhibitors of the Cyclic Nucleotide Phosphodiesterase PDE1., Humphrey JM, Movsesian M, Am Ende CW, Becker SL, Chappie TA, Jenkinson S, Liras JL, Liras S, Orozco C, Pandit J, Vajdos FF, Vandeput F, Yang E, Menniti FS, J Med Chem. 2018 May 24;61(10):4635-4640. doi: 10.1021/acs.jmedchem.8b00374. Epub, 2018 May 10. PMID: 29718668

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