Design, synthesis, and biological evaluation of novel indoles targeting the influenza PB2 cap binding region af McGowan, DC, Balemans, W, Embrechts, W, Motte, M, Keown, JR, Buyck, C, Corbera, J, Funes, M, Moreno, L, Cooymans, L, Tahri, A, Eymard, J, Stoops, B, Strijbos, R, van den Berg, J, Fodor, E, Grimes, JM, Koul, A, Jonckers, THM, Raboisson, P, Guillemont, J