Deng, X., Zhang, Y., Rong, J., Kumata, K., Shao, T., Wang, G., Hatori, A., Mori, W., Yu, Q., Hu, K., Fujinaga, M., Shao, Y., Josephson, L., Sun, S., Zhang, M., & Liang, S. (2020). synthesis and preliminary evaluation of 18F-labeled 1-(6, 7-dimethyl-4-(methylamino)-1, 3-dihydro-2H-pyrrolo[3, 4-c]pyridin-2-yl)-2-(trans-2-(6-fluoropyridin-3-yl)cyclopropyl)ethan-1-one for imaging muscarinic acetylcholine receptor subtype 4. Tetrahedron letters, 61(27), . http://access.bl.uk/ark:/81055/vdc_100104106546.0x000057