3,3',3''-[Methylstannylidynetris(thio)]tripropanoic acid tris[3-(methoxycarbonyl)propyl] ester

dimethyl 10-[[2-[(5-methoxy-1,5-dioxopentyl)oxy]ethyl]thio]-10-methyl-5,15-dioxo-6,14-dioxa-9,11-dithia-10-stannanonadecanedioate