1-(5-(5-butylfuran-2-yl)thiophen-2-yl)ethanone

1-[5-(2-propylthiazol-5-yl)thiophen-2-yl]ethanone

methyl 5-(5-acetylthiophen-2-yl)-2-methylfuran-3-carboxylate

1-[5-(5-acetylfuran-2-yl)thiophen-2-yl]ethanone