The molecule is a macrocyclic lactam with oximo amide groups having a -E,E configuration. Isolated from the marine sponge Ianthella, it has been shown to exhibit calcium channel modulatory activity. It has a role as a metabolite and a calcium channel modulator. It is an organobromine compound, a polyphenol, a lactam, a macrocycle, a ketoxime and a cyclic ether.
(12E,25E)-5,16,21,32,36-pentabromo-4,17-dihydroxy-12,25-bis(hydroxyimino)-2,19-dioxa-10,27-diazapentacyclo[28.2.2.220,23.13,7.114,18]octatriaconta-1(32),3,5,7(38),14(37),15,17,20(36),21,23(35),30,33-dodecaene-11,26-dione