cesium local anesthetic reagent dehydration reaction isomer solvent glucose catalysts diels alder reaction dna molecule acetone temperatures krebs cycle molecules carbon atoms dehydration catalytic hydrogenation reactants equilibrium alkene correlation hydrogen protons neutrons and electrons joules journal article atoms exothermic reaction atomic weights chemistry carbon dioxide junior chemistry nucleophile chemical reaction amino acids chemical reactions heat flow cytosine organic reactions acyl byproducts sodium single step phosphate protons catalyst alkenes covalent bonds selectivity concentration hydrogen peroxide cells chirality molecule aspirin derivatives synthesis activation energy alkyne salicylic acid highest energy alcohols thymine carbons cell cycles esters acids and bases electron acceptor chromosomes Organic transition state organic chemistry living organisms room temperature ketone electron density water molecules metabolism ethers electrophile alcohol proteins hydrogen bonds methanol chemicals racemic mixture intermediates cis atom electron pair electrons organic solvents substrates oxidation pyruvate constituents atomic mass presence ammonia hydrogen gas reagents