с формулой

• Acrolein is the simplest member of the class of unsaturated aldehydes, formula, CH₂=CHCHO.

• Acetone is a chemical compound of formula CH₃COCH₃.

• The most important group of alicyclic hydrocarbons are the terpenes of the (general) formula C₁₀H₁₆.

• Amide (acid) is a derivative of carboxylic acid with (or of, or having) the (general) formula R-(C=O)-NH₂.