(2R,3R,4R,5S,6S)-(+)-6-hydroxy-4-(N-methoxycarbonyl-N-methylamino)-3,5-bis(methoxymethyloxy)-2-methyl-2-(1,4,5,8-tetramethoxy-2-naphthalenyl)tetrahydropyran

ethyl 2,4-dimethylcyclohexa-1,3-diene-1-carboxylate

(+)-2',4'-di-O-acetyl-7,8-dihydronogarene