Bis(2-((2-methyl-3-(octylthio)propanoyl)oxy)ethyl) 4,10,16-tris(3-(2-((2-methyl-3-(octylthio)propanoyl)oxy)ethoxy)-3-oxopropyl)-4,7,10,13,16-pentaazanonadecane-1,19-dioate

Bis(2-((2-methyl-3-(octylthio)propanoyl)oxy)ethyl) 4,10,16-tris(3-(2-((2-methyl-3-(octylthio)propanoyl)oxy)ethoxy)-3-oxopropyl)-4,7,10,13,16-pentaazanonadecane-1,19-dioate,