山奈根茎含挥发油,其主要成分是对-甲氧基桂皮酸乙酯(ethyl-p-methoxycinnamate),顺式及反式桂皮酸乙酯(ethyl cinnamate),顺式及反式桂皮酸乙酯(ethyl cinnamate),龙脑(borneol),樟烯(camphene),3-蒈烯(Δ3-carene),对-甲氧基苏合香烯(p-methoxystyrene),还含α-侧柏烯(α-thujene),α-及β-蒎烯(pinene),苯甲醛(benzaldehyde),香桧烯(sabinene),α及β-水芹烯(phellandrene),对-聚伞花素(ρ-cymene),柠檬烯(limonene),1,8-桉叶素(1,8-cineole) ,4-松油醇(terpin-4-ol),α-松油醇(α-terpineol),优葛缕酮(eucarvone),茴香醛(anisaldehyde),乙酸龙脑酯(bornyl acetate),百里香酚(thymol),α-松油醇乙酸酯(α-terpinyl acetate),β-榄香烯(β-elemene),δ-芹子烯(δ-selinene),十五烷(pentadecane),γ-荜茄烯(γ-cadinene),十六烷(hexadecane),十七烷(heptadecane),3-(4-甲氧基苯基)-2-甲基-2-丙烯酸[3-(4-methyoxyphenyl)-2-methyl-2-acrylic acid],5-苯基噻唑(5-phenylthiazole),3-亚甲基-6-异丙基环忆烯[3-methylene-6-(1-methylethyl)-cyclohexene],β-松油醇,异龙脑(***borneol),2,5,6-***癸烷(2,5,6-trimethyldecane),2,4,6-***基辛烷(2,4,6-trimethyloctane),1a,2,3,4,4a,5,6,7b-八氢化-1,1,4,7-本甲基-1H-环丙[e]奥[1a,2,3,4,4a,5,6,7b-octahydro-1,1,4,7-tetramethyl-1H-cycloprop[e]azulene],9,12-十八碳二烯醛(9,12-octadecadienal)。又含黄酮类成分:山柰酚(kaempferol),山柰素(kaempferide)。还含维生素P。