Table 1.

Iridoids isolated from S. oblata (1–22).

No.	Compounds	Plant parts	References
1	Syringopicrogenin B	Seed coats, flower buds, leaves	Wang et al., 2010, Dong et al., 2011, Zhang et al., 2018
2	Syringopicroside B	Leaves	Zhang et al., 2018
3	Fliederoside B	Leaves	Zhang et al., 2018
4	Syringopicroside A	Leaves	Wang, 2008
5	7-Methyl-1-oxo-octahydro-cyclopenta[c]pyran-4-carboxylic acid	Leaves	Li, Xu, Hao, Yang, & Li, 2009
6	Syringopicrogenin A	Seed coats, leaves	Wang et al., 2010, Han, 2012, Zhang et al., 2018
7	Syringopicrogenin C	Leaves	Han, 2012, Zhang et al., 2018
8	Syringopicrogenin D	Leaves	Han, 2012, Zhao et al., 2016, Zhang et al., 2018
9	Syringopicrogenin E	Leaves	Han, 2012, Zhao et al., 2016, Zhang et al., 2018
10	Syringopicrogenin F	Leaves	Zhang et al., 2018
11	(8E)-Ligstroside B	Leaves	Zhang et al., 2018
12	(8E)-Ligstroside A	Leaves	Zhang et al., 2018
13	7-Dehydrologanin	Leaves	Zhang et al., 2018
14	(8E)-Ligstroside	Seed coats, leaves, twigs	Wang et al., 2010, Zhao et al., 2012, Zhang et al., 2018
15	Oleuropein	Barks, twigs, leaves	Zhang, Zhang, & Wang, 2006; Zhao et al., 2012, Zhang et al., 2018
16	(8E)-Gstroside	Barks	Zhang, Zhang, & Wang, 2006
17	8E-Nüzhenide	Seeds	Zhang, Guo, Han, Zhao, & Wang, 2011
18	2-(p-Hydroxyphenyl)-ethyl-2,6-bis(2S,3E,4S)-3-ethylidene-2-(β-d-glucopyranosyloxy)-3,4-dihydro-5-(methoxycarbonyl)-2H-pyran-4-acetate	Seeds	Zhang, Guo, Han, Zhao, & Wang, 2011
19	4-O-11-Methyloleoside-p-hydroxyphenyl-(6–11-methyloleoside)-β-d-glucopyranoside	Seeds	Zhang, Guo, Han, Zhao, & Wang, 2011
20	Syringalactone B	Leaves	Wang, 2008
21	2-(3,4-Dihydroxyphenyl)ethyl(1R,4aS,8R,8aS)-8-methyl-6-oxo-1-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethy)oxan-2-yloxy-4a,5,8,8a-tetrahydro-1H-pyrano[3,4-c]pyran-4-carboxylate	Leaves	Tian, Li, Lv, Zhang, & Liu, 2013
22	7β-d-Glucopyranosyl-11-methyloleoside	Seeds	Zhang, Guo, Han, Zhao, & Wang, 2011