73940-87-1 Bis(triphenyltin)acetylenedicarboxylate Ethynylenebis(carbonyloxy)bis[triphenylstannane] NSC203181 Stannane, [(1,4-dioxo-2-butyne-1,4-diyl)bis(oxy)]bis[triphenyl- Stannane, ethynylenebis(carbonyloxy)bis[triphenyl-