2H-Naphtho[1,8-bc]furan-2-one, 6-[2-(3-furanyl)ethyl]decahydro-6-hydroxy-2a,5a,7-trimethyl-, [2aS-(2a.alpha.,5a.beta.,6.alpha.,7.alpha.,8a.alpha.,8b.alpha.)]- 465-92-9 8.beta.H-Labda-13(16),14-dien-19-oic acid, 15,16-epoxy-6.beta.,9-dihydroxy-, .gamma.-lactone MARRUBIN Marrubiin NSC36693