Samanta, R., Narayan, R., Bauer, J. O., Strohmann, C., Sievers, S., & Antonchick, A. P. (2015). Oxidative regioselective amination of chromones exposes potent inhibitors of the hedgehog signaling pathway. Chemical Communications, 51(5), 925-928. doi:10.1039/c4cc08376h.