Neopetrocyclamines A and B, polycyclic diamine alkaloids from the sponge Neopetrosia cf exigua.
Liang Z, Sulzmaier FJ, Yoshida WY, Kelly M, Ramos JW, Williams PG. Neopetrocyclamines A and B, polycyclic diamine alkaloids from the sponge Neopetrosia cf exigua. J Nat Prod. 2015 Mar 27; 78(3):543-7.