Inordertomeetthedevelopmentofall-Englishorbilingualteachingoforganicchemistryinmedicalcollegesofourcountry，wearenowgroupedtoeditthisbook.ThesequenceofchaptersandrelatedcontentsinthisbookareconsistenttothesixtheditionofOrganicChemistryinChinesewhichispublishedbyPeoplesMedicalPublishingHouseasaNHOsprogrammingbookmaterial.Wehaveapplied"threebasiccontents--basictheories，basicknowledge，basicskills"and"fivefeaturesthoughtful，scientific，advanced，heuristic，adaptable"tothisbook.Thatmeansprecisedemonstrations，cleararrangements，visualilluminationsandfluentlanguage.Thewholebookisarrangedinaproperandgradualsequencetoavoiddestroyingthecoherenceorconnectionsofchaptersandfurthermoreunnecessaryrepetition.