Anti-parasitic guanidine and pyrimidine alkaloids from the marine sponge Monanchora arbuscula - Santos, M F; Harper, P M; Williams, D E; Mesquita, J T; Pinto, E G; da Costa-Silva, T A; Hajdu, E; Ferreira, A G; Santos, R A; Murphy, P J; Andersen, R J; Tempone, A G; Berlinck, R G (J Nat Prod, 2015)