113275-14-2 Formamide, N-(11-(16-hydroxy-10-methoxy-11,21-dimethyl-12,18-dioxo-3,7,19,27-tetraoxa-29,30,31-triazatetracyclo(242112,516,9)hentriaconta-2(31),4,6(30),8,13,24,26(29),28-octaen-20-yl)-4,10-dimethoxy-5,9-dimethyl-6-oxo-1-undecenyl)-N-methyl- Halichondramide Kabiramide C, 21-O-de(aminocarbonyl)-23,24-didehydro-14-demethoxy-3,23-didemethyl-25-deoxy-25-oxo-