Nicole Kunesch*, Christine Miet et Jacques Poisson Laboratoire de Chimie des Substances ThCrapeutiques Naturelles. CNRS UA 496 Centre d%tudes Pharmaceutiques, 92296 Chkenay-Malabry Cedex France ... Summary : Guunidine efficiently and instantly deprotects a series of acetylated carbohydrates and phenols at room temperature. Phenolic acetates can be cleaved in the presence of benzylic acetates, while acetamides, benzoates ...