analysis biochemistry catalysis catalysts chemicalengineering chemicalmodification chemicalreactions chemistry chimie composésorganiques dictionaries essaisetréactifs essencesandessentialoils herbal heterocyclicchemistry heterocycliccompounds hydrocarbons indicatorsandreagents lifesciences medicinal medicinalplants medicine methods organic organicchemistry organiccompounds organiccompoundschemicalreactions organischechemie organosiliconcompounds plants polycycliccompounds proteins qd291m861988 qd291m862005 qualitycontrol reagentia science sinteseorganica(quimica) synthese(chemie) synthesis synthèse