Chen, Yingjie et al. published their research in Shenyang Yaoxueyuan Xuebao in 1987 | CAS: 112246-15-8

20(R)-Ginsenoside Rh2 (cas: 112246-15-8) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. There is large number of marine macrolide natural products that contain tetrahydropyran and tetrahydrofuran ring together. For instance, goniodomin A (actin targeting polyether), prorocentrolide (toxin halistatins), and percentotoxineCOA of Formula: C36H62O8

Minor saponins from the leaves of Panax ginseng C.A.Meyer was written by Chen, Yingjie;Xu, Suixu;Ma, Qifeng;Yao, Xinsheng;Ogihara, Yukio;Takeda, Tadahiro. And the article was included in Shenyang Yaoxueyuan Xuebao in 1987.COA of Formula: C36H62O8 This article mentions the following:

Five minor compounds isolated from the leaves of P. ginseng were characterized as 20(R)-protopanaxatriol, daucosterin, 3β,12β-dihydroxy-dammar-20(22),24-diene-3-O-β-D-glucopyranoside (I), 20(R)-protopanaxadiol-3-O-β-D-glucopyranoside (II), and ginsenoside Rh2, resp., on the basis of spectral analyses and chem. evidence. The two new saponins, I and II, were named as ginsenoside Rh3 and 20(R)-ginsenoside Rh2. Nine other major saponins obtained simultaneously were identical with ginsenoside Rh1, -Rg3, -Rg2, -Rg1, -Re, -Rd, -Rc, -Rb2 and Rb1 resp. In the experiment, the researchers used many compounds, for example, 20(R)-Ginsenoside Rh2 (cas: 112246-15-8COA of Formula: C36H62O8).

20(R)-Ginsenoside Rh2 (cas: 112246-15-8) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. There is large number of marine macrolide natural products that contain tetrahydropyran and tetrahydrofuran ring together. For instance, goniodomin A (actin targeting polyether), prorocentrolide (toxin halistatins), and percentotoxineCOA of Formula: C36H62O8

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics