(S)-N-(2-(2-(2-methoxyethoxy)ethoxy)ethyl)-N-methyl-2-(2-methyl-2-((((S)-11-methyl-12-oxo-2,5,8-trioxa-11-azatetradecan-13-yl)carbamothioyl)-L-alanyl)hydrazine-1-carbothioamido)propanamide