(6S,11R,16S,21S)-21,6-Dibenzyl 22-tert-butyl 11,16-bis((2-(benzyloxy)-2-oxoethyl)carbamoyl)-2,2-dimethyl-4,9,18-trioxo-3-oxa-13,14-dithia-5,10,17-triazadocosane-6,21,22-tricarboxylate-d10