. . . . . "C0006174" . "D001952" . "D04.075" . "D02.455.426.100" . . . . "bridged-ring compound"@en . "cyclic hydrocarbons that contain multiple rings which share one or more bridgehead connections"@en . . "bridged-ring compounds"@en . . "bridged-ring compounds"@en . . . "bridged-ring compounds"@en .