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Table 1 The chemical constituents occurring in the aboveground portion of D. nipponica

From: Dioscorea nipponica Makino: a systematic review on its ethnobotany, phytochemical and pharmacological profiles

Class Chemical compounds Refs.
Phenanthrene-based compounds 4,6-Dihydroxy-2,3,7-trimethoxy-9,10-dihydrophenanthrene (19) [57]
1-(4,7-Dihydroxy-2,6-dimethoxy-9,10-dihydrophenanthrenyl)-4,7-dihydroxy-2,6-dimethoxy-9,10-dihydrophenanthrene (20) [57, 58]
7-Hydroxy-2,3,5-trimethoxy-9,10-dihydrophenanthrene (21) [57]
2,7-Dihydroxy-3,5-dimethoxy-9,10-dihydrophenanthrene (22, 6-methoxycoelonin) [57, 59]
4,7-Dihydroxy-2,3,6-trimethoxyphenanthrene (23) [57, 60]
3,7-Dihydroxy-2,4,6-trimethoxyphenanthrene (24) [57]
1-(2,7-Dihydroxy-4,6-dimethoxyphenanthrenyl)-2,7-dihydroxy-4,6-dimethoxyphenanthrene (25) [57]
7-Hydroxy-2,6-dimethoxy-1,4-phenanthraquinone (26, dioscoreanone) 2-ethoxy-7-hydroxy-6-methoxy-1,4-phenanthraquinone (27) [57]
Phenols and organic acidic compounds 3′,5-Dihydroxy-3,4′-dimethoxybibenzyl (28) [57]
4,4′-Dihydroxy-3,3′-dimethoxy-trans-stilbene (29) [57, 61]
1,7-bis(4-Hydroxyphenyl)-1,4,6-heptatrien-3-one (30) [57, 59, 61]
1,7-bis(4-Hydroxyphenyl)-4,6-heptabien-3-one (31) [57, 61]
3,4-Dihydroxybenzoic acid (32, protocatechuic acid) [57, 61]
4-Hydroxy-3-methoxybenzoic acid (33, vanillic acid) [57, 61]
4-Hydroxybenzoic acid (34) [57, 61]
Pyrocatechol (35) [57, 61]
Coumarins (3S)-6,8-dihydroxy-3-phenyl-3,4-dihydroisocoumarin (36, montroumarin) [57, 58]
Flavonoids Kaempferol (37) [57, 61]
Kaempferol-3-O-β-d-glucopyranoside (38) [57, 58]
Kaempferol-3-O-β-rutinoside (39) [57, 58]
Quercetin-3-O-rutinoside (40, rutin) [57, 61]
Glycosides 4-Hydroxyphenethyl-ol-4-O-β-d-glucopyranoside (41, icariside D2) [57, 61]
Steroids Daucosterol (42) [57, 58]
Polyols d-Mannitol (43) [57, 58]