MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Methyl butanoate, molecular model. The molecular formula of this organic chemical is C5.H10.O2. The atoms (spheres) are colour-coded: carbon (black), hydrogen (white) and oxygen (red). The atoms are joined by chemical bonds, with a carbon-oxygen (carbonyl) double bond at upper right, and an adjacent carbon-oxygen (ether) single bond. This combination is known as an ester. Also known as methyl butyrate, this chemical has a fruity smell, and is used as a perfume and flavouring.
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