(21S,27S,18R,24R,30R)-18-Amino-14,20,23,26,29-pentaaza-21,27-bis(3,5-dichloro-4-hydroxyphenyl)-37-hydroxy-29-methyl-2-oxa-19,22,25,28-tetraoxohexacyclo[30.2.2.1<3,7