Synonyms: Eribulin mesylate;(2R,3R,3aS,7R,8aS,9S,10aR,11S,12R,13aR,13bS,15S,18S,21S,24S,26R,28R,29aS)-2-[3-Amino-2(S)-hydroxypropyl]-3-methoxy-26-methyl-20,27-bis(methylene)-11,15:18,21:24,28-triepoxy-7,9-ethano-12,15-methanoperhydro-9H,15H-furo[3,2-i]furo[2,3:5,6]pyrano[4,3-b][1,4]dioxacyclopentacosin-5-one