394719-16-5 1,4-Dioxa-7,10,13,16-tetraazacyclooctadecane-8,11,12,15-tetrone,9,14-dimethyl-, (9S,14S)- 137031-45-9 (3S,11S)-8-hydroxy-3'-methoxy-4',9-dimethyl-3-[(2S,4S)-4-methyl-5-oxotetrahydrofuran-2-yl]-2,3,5,6,7,8-hexahydro-1H,5'H,10H-spiro[cyclopenta[b]pyrrolo[1,2-a]azepine-11,2'-furan]-5',10-dione