Table 1. IC₅₀ Values (μM) of Sanjoseolide (1) and Their Derivatives against Cholangiocarcinoma Cell Lines^a.

compound	REB	HCCC-9810
7a	25.7 ± 0.5	31.0 ± 1.0
11	59.1 ± 3.8	101.1 ± 1.8
10	28.3 ± 1.4	29.5 ± 1.4
8b	73.2 ± 2.6	102.5 ± 4.4
8c	105.0 ± 2.8	124.0 ± 7.4
8d	31.2 ± 1.0	20.5 ± 1.6
8e	12.8 ± 0.4	12.7 ± 0.6
sanjoseolide(1)	15.7 ± 0.3	15.6 ± 1.2
cisplatin	5.0 ± 0.3	1.8 ± 0.11

^aData presented as a mean ± standard deviation (SD) of three replicate measurements of the same sample.