A1IKJ a1ikj 2R,13S,E)-2-methyl-1,2,3,5,10,11,13,14,20,21,24,25-dodecahydro-19H,23H-16,18-etheno-9,13-methano-7,28-(metheno)[1,4]diazepino[2,3-k]pyrido[1,2-s][1,4]dioxa[7,19]diazacyclodocosine-4,8-dione A1IKJ