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(4S,7S,10R,17S,20S,23R)-10-Benzyl-4-sec-butyl-7,20-bis-((S)-1-hydroxy-ethyl)-17-isobutyl-23-methyl-12,25-dithia-3,6,9,16,19,22,27,28-octaaza-tricyclo[22.2.1.111,14]octacosa-1(26),11(28),13,24(27)-tetraene-2,5,8,15,18,21-hexaone