1,6-Dioxa-2-azaspiro(4.6)undeca-2,7,9-triene-3-carboxamide,N-(3-(4-(2-aminoethyl)-2,6-dibromophenoxy)propyl)-8,10-dibromo-4-hydroxy-9-methoxy-, (4R,5R)-rel-(-)- 85819-66-5