1-(2-Thienyl)ethanone semicarbazone

(1-thiophen-2-ylethylideneamino)urea

1-[1-(2-Thienyl)ethylidene]semicarbazide

(E)-1-(1-(thiophen-2-yl)ethylidene)seMicarbazide

1-(2-Thienyl)acetaldehyde [amino(hydroxy)methylene]hydrazone