title: The lactonization of ring-substituted coumarinic acids. Structural effects on the partitioning of tetrahedral intermediates in esterification.
mesh_terms: D002264:Carboxylic Acids / Q000138:chemical synthesis; D003374:Coumarins / Q000138:chemical synthesis*; D003500:Cyclization; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007783:Lactones / Q000138:chemical synthesis*; D013056:Spectrophotometry, Ultraviolet; D013329:Structure-Activity Relationship
chemical_list: D002264:Carboxylic Acids; D003374:Coumarins; D007783:Lactones