1,4-phenylenediethyne-2,1-diyl bis(thiocyanate) InChI=1/C12H4N2S2/c13-9-15-7-5-11-1-2-12(4-3-11)6-8-16-10-14/h1-4 thiocyanic acid, 1,4-phenylenedi-2,1-ethynediyl ester