POLY(OXY-1,2-ETHANEDIYL), .ALPHA.-HYDRO-.OMEGA.-HYDROXY-, 15,15'-DIESTER WITH N-ACETYL-L-ISOLEUCYL-L-CYSTEINYL-L-VALYL-1-METHYL-L-TRYPTOPHYL-L-GLUTAMINYL-L-.ALPHA.-ASPARTYL-L-TRYPTOPHYLGLYCYL-L-ALANYL-L-HISTIDYL-L-ARGINYL-L-CYSTEINYL-L-THREONYL-2-(2-(2-A
