*2.1. Purification and Identification of Chemical Constituents*

The basswood cultivated fruiting bodies of *T. camphoratus* (3.6 kg) were repeatedly extracted with ether (4 × 10 L) for 3 days. The ether extract was concentrated in vacuo to afford a brown syrup (370 g) and then partitioned between water and ether. The ether layer was chromatographed repeatedly over silica gel, as described in Supplementary Materials. In total, 45 compounds were obtained. Among them, two triterpenoids, camphoratins K (**1**) and N (**2**), and two benzenoids, benzocamphorins G (**3**) and I (**4**), were isolated and characterized from *T. camphoratus* for the first time. Other known isolated compounds were triterpenoids, including methyl antcinate A (**5**), antcins A (**6**), C (**12**), and K (**18**), zhankuic acid A methyl ester (**7**), zhankuic acids A (**8**), B (**11**), C (**9**), and D (**10**), camphoratins E (**13**) and F (**14**), methyl antcinate (**15**), antcamphins A (**19**), B (**16**), and D (**17**); terpenoids, including 1-hydroxy-*p*-menth-3-en-2-one (**20**), nerolidol (**21**), coenzyme Q (**22**), 4-acetylantroquinonol B (**23**); steroids, including ergosterol (**24**), ergosterol peroxide (**25**), camphoratin I (**26**); lignans, including sesamin (**27**) and 4-hydroxysesamin (**28**); and benzenoids, including antrocamphins A (**30**) and B (**29**), benzocamphorins C (**37**), D (**44**), E (**43**), F (**31**), and H (**32**), methyl 3,4,5-trimethoxybenzoate (**33**), methyl 2,3,4,5-tetramethoxy benzoate (**34**), 1-methyl-2,3,4,5-trimethoxy benzene (**35**), 2,3,6-trimethoxy-5-methylphenol (**36**), methyl 2,5-dimethoxy-3,4-methylenedioxybenzoate (**38**), 4,5-dimethoxy-6-methyl-1,3-benzodioxole (**39**), 4,7-dimethoxyl-5-methyl-1,3-benzodioxole (**40**), 2,3-(methylenedioxy)-4-methyl-5-methylphenol (**41**), 2,2,5,5-tetramethoxyl-3,4,3,4-bimethylenedioxyl-6,6-dimethylbiphenyl (**42**), and tetracanyl ferulate (**45**) (see Supplementary Materials for their references).
