1-oxa-2-azaspiro[4.5]deca-2,6,8-triene-3-carboxamide, 7,9-dibromo-N-[3-[2,6-dibromo-4-[2-[[(7,9-dibromo-10-hydroxy-8-methoxy-1-oxa-2-azaspiro[4.5]deca-2,6,8-trien-3-yl)carbonyl]amino]-1-hydroxyethyl]p 7,9-dibromo-N-{3-[2,6-dibromo-4-(2-{[(7,9-dibromo-10-hydroxy-8-methoxy-1-oxa-2-azaspiro[4.5]deca-2,6,8-trien-3-yl)carbonyl]amino}-1-hydroxyethyl)phenoxy]-2-hydroxypropyl}-10-hydroxy-8-methoxy-1-oxa-2- InChI=1/C31H30Br6N4O11/c1-48-24-16(34)5-30(26(44)21(24)36)7-18(40-51-30)28(46)38-9-13(42)11-50-23-14(32)3-12(4-15(23)33)20(43)10-39-29(47)19-8-31(52-41-19)6-17(35)25(49-2)22(37)27(31)45/h3-6,13,20,26-27,42-45H,7-11H2,1-2H3,(H,38,46)(H,39,47