(5S,6S,9S)-tert-Butyl 6-benzyl-9-(tert-butyl)-5-hydroxy-8,11-dioxo-3-(4-(pyridin-2-yl)benzyl)-12-oxa-2,3,7,10-tetraazatridecan-1-oate

(5S,6S,9S)-tert-Butyl 6-benzyl-9-(tert-butyl)-5-hydroxy-8,11-dioxo-3-(4-(pyridin-2-yl)benzyl)-12-oxa-2,3,7,10-tetraazatridecan-1-oate