2-[2-[[2-[[(11E)-18-(2,3-dihydroxybutan-2-yl)-11-ethylidene-59-hydroxy-8,31-bis(1-hydroxyethyl)-26,40-dimethyl-43-methylidene-6,9,16,28,38,41,44,47-octaoxo-37-propan-2-yl-23-sulfanylidene-27-oxa-13,20,55-trithia-7,10,17,24,36,39,42,45,48,51,57,61,62,63,64-pentadecazanonacyclo[23.23.8.329,35.11,52.12,5.112,15.119,22.153,56.032,60]tetrahexaconta-29(61),30,32(60),33-tetraen-50-yl]methyl]-1,3-thiazolidine-5-carbonyl]amino]prop-2-enoylamino]prop-2-enoic acid