Table 1. Initial screening of the inhibitory effects of danshen's major components towards UGTs. The values are given as mean plus SD (n = 3).

	Tanshinone I	Tanshinone IIA	Cryptotanshinone	Dihydrotanshinone I
UGT1A1	77.2 ± 2.8	69.8 ± 1.3	43.5 ± 1.2	67.3 ± 17.5
UGT1A3	68.2 ± 3.4	46.7 ± 1.6	22.2 ± 0.0	38.5 ± 0.4
UGT1A6	42.7 ± 0.5	38.7 ± 14.2	13.7 ± 3.4	38.9 ± 0.4
UGT1A7	25.8 ± 2.2	24.9 ± 2.4	7.2 ± 0.7	22.5 ± 9.3
UGT1A8	97.5 ± 1.7	79.7 ± 3.0	33.1 ± 7.6	52.1 ± 0.4
UGT1A9	29.9 ± 0.6	14.7 ± 3.1	4.9 ± 0.3	8.0 ± 0.0
UGT1A10	74.6 ± 2.2	56.8 ± 1.6	13.3 ± 4.8	37.2 ± 0.0
UGT2B7	67.6 ± 2.9	58.3 ± 0.2	12.8 ± 0.5	44.1 ± 6.6
UGT2B15	58.1 ± 0.8	65.6 ± 5.2	14.0 ± 0.5	28.6 ± 0.4