Akihito Yokosuka
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Explore the profile of Akihito Yokosuka including associated specialties, affiliations and a list of published articles.
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71
Citations
657
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Recent Articles
1.
Yoshizawa Y, Fujita N, Yokosuka A, Mimaki Y
Chem Pharm Bull (Tokyo)
. 2025 Mar;
73(3):168-172.
PMID: 40058824
Two new isoflavone glucosides, irisolone 4'-O-[O-β-d-glucopyranosyl-(1→6)-O-β-d-glucopyranosyl-(1→6)-β-d-glucopyranoside] (1) and iriskashmirianin 4'-O-[O-β-d-glucopyranosyl-(1→6)-O-β-d-glucopyranosyl-(1→6)-β-d-glucopyranoside] (2) were isolated from the underground parts of Iris florentina (Iridaceae). The structures of 1 and 2 were determined based...
2.
Steroidal constituents in the whole plants of Helleborus niger and their cytotoxic activity in vitro
Yoshizawa Y, Yokosuka A, Inomata M, Iguchi T, Mimaki Y
Phytochemistry
. 2024 Sep;
229:114272.
PMID: 39260588
Phytochemical investigation of the whole plants of Helleborus niger L. (Ranunculaceae) resulted in the isolation of five undescribed compounds, including one bufadienolide (1), two bufadienolide rhamnosides (2 and 3), and...
3.
Yokosuka A, Yamada C, Saito M, Yokogawa S, Mimaki Y
Chem Pharm Bull (Tokyo)
. 2022 Oct;
70(10):720-725.
PMID: 36184455
Five podophyllotoxin derivatives (1-5), two diterpenoids (6 and 7), three diterpenoid xylosides (8-10), a flavanonol glycoside (11), flavonol (12), and biflavonoid (13) were isolated from the leaves of Thujopsis dolabrata...
4.
Yokosuka A, Shimomura T, Yokogawa S, Oguro A, Miyake K, Mimaki Y
Chem Pharm Bull (Tokyo)
. 2022 Feb;
70(2):175-181.
PMID: 35110439
Two novel triterpene glycosides (1 and 2), 17 known triterpene glycosides (3-19), two known flavonoid glycosides (20 and 21), and two known norsesquiterpene glucosides (22 and 23) were isolated from...
5.
Yokosuka A, Ishihara K, Yamada T, Iguchi T, Mimaki Y
J Agric Food Chem
. 2021 Nov;
69(48):14568-14579.
PMID: 34845902
Twelve steroidal glycosides (-) were isolated from the aerial parts of L. (Poaceae). Among the isolated compounds, was directly isolated from the plant for the first time, and - were...
6.
Yokosuka A, Iguchi T, Jitsuno M, Mimaki Y
Molecules
. 2021 Oct;
26(20).
PMID: 34684767
Previously, the authors conducted phytochemical investigations of the aerial parts of and reported triterpene glycosides and lignan derivatives. In continuation of the preceding studies, 17 lignans and lignan glycosides (-)...
7.
Yokosuka A, Inomata M, Yoshizawa Y, Iguchi T, Mimaki Y
J Nat Med
. 2021 Jan;
75(2):393-402.
PMID: 33502658
A new bufadienolide (1), two new bufadienolide glycosides (2 and 3), a new ecdysteroid (4), and four known compounds (5-8), were isolated from the whole plants of Helleborus niger L....
8.
Iguchi T, Yokosuka A, Tamura N, Takano S, Mimaki Y
Phytochemistry
. 2020 Jun;
176:112415.
PMID: 32480062
Cytotoxicity-guided fractionation of the MeOH extract of Helleborus lividus Aiton ex Curtis (Ranunculaceae) resulted in the isolation of five undescribed bufadienolide glycosides and two undescribed bufadienolides, along with three known...
9.
Iguchi T, Uchida Y, Takano S, Yokosuka A, Mimaki Y
Chem Pharm Bull (Tokyo)
. 2020 Mar;
68(3):273-287.
PMID: 32115535
Phytochemical analysis of the whole Helleborus foetidus plants identified 28 steroidal glycosides (1-28), including 20 novel spirostanol glycosides (1-20) and a novel furostanol glycoside (21). The structures of the newly...
10.
Iguchi T, Yokosuka A, Kawahata R, Andou M, Mimaki Y
Phytochemistry
. 2020 Jan;
172:112277.
PMID: 31991264
Two undescribed bufadienolide glucosides and four undescribed bufadienolides were isolated from the whole plants of Helleborus foetidus (Ranunculaceae). Their structures were determined by extensive spectroscopic analysis and the results of...