trimethyl-[2-oxo-2-[(2Z)-2-(thiophen-2-ylmethylidene)hydrazinyl]ethyl]azanium,chloride

dithiophen-2-ylmethanol

1-hydroxy-2,2,6,6-tetramethylpiperidine

thiophene-2-carboxylic acid 2,2,6,6-tetramethyl-piperidin-1-yl ester

6-chloro-2-thiophen-2-ylchromen-4-one