Search for "N’-(2-alkynylbenzylidene)hydrazide" in Full Text gives 2 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2014, 10, 2286–2292, doi:10.3762/bjoc.10.238
Beilstein J. Org. Chem. 2014, 10, 481–513, doi:10.3762/bjoc.10.46