Keywords: Carboxylic-acid-anhydride.png Structural formula of a general anhydride group RCO <sub>2</sub>O Author date of creation self made by Ben Mills at 17 29 8 March 2006 UTC Source user-created image Comments high-resolution black and white PNG; ChemDraw / Photoshop 2006-03-08 own assumed Benjah-bmm27 Carboxylic anhydrides |