N-((7R,8R)-8-((2S,5S,8R,11S,14S,17S,20S,23R,26S,29S,32S)-5-ethyl-11,17,26,29-tetraisobutyl-14,32-diisopropyl-1,7,8,10,16,20,23,25,28,31-decamethyl-3,6,9,12,15,18,21,24,27,30,33-undecaoxo-1,4,7,10,13,16,19,22,25,28,31-undecaazacyclotritriacontan-2-yl)-8-H
n-((7r,8r)-8-((2s,5s,8r,11s,14s,17s,20s,23r,26s,29s,32s)-5-ethyl-11,17,26,29-tetraisobutyl-14,32-diisopropyl-1,7,8,10,16,20,23,25,28,31-decamethyl-3,6,9,12,15,18,21,24,27,30,33-undecaoxo-1,4,7,10,13,16,19,22,25,28,31-undecaazacyclotritriacontan-2-yl)-8-h