(2S)-2-({(20S,26S,17R,23R,29R)-13,19,22,25,28-Pentaaza-20,26-bis(3,5-dichloro-4-hydroxyphenyl)-17-[2-(3,5-dichloro-4-hydroxyphenyl)-2-oxoacetylamino]-15,36-dihydroxy-28-methyl-2-oxa-14,18,21,24,27-pentaoxohexacyclo[29.2.2.1<3,7