Publications by authors named "Mariko Kitajima"

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Studies on the synthesis and opioid agonistic activities of mitragynine-related indole alkaloids: discovery of opioid agonists structurally different from other opioid ligands.
Hiromitsu Takayama, Hayato Ishikawa, Mika Kurihara, Mariko Kitajima, Norio Aimi, Dhavadee Ponglux, Fumi Koyama, Kenjiro Matsumoto, Tomoyuki Moriyama, Leonard T Yamamoto

April 2002

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Uncamarins A-D, oxindole alkaloids from Philippine Uncaria longiflora and their anti-amyloidogenic properties.
Sarleen G Castro, Eisuke Hosoya, Mariko Kitajima, Hiroyuki Nakamura, Joe Anthony H Manzano

Phytochemistry· October 2025

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Voacandial and Voacanginone A, Iboga-Type Monoterpenoid Indole Alkaloids from Root Bark: Isolation, Structure Elucidation, and Asymmetric Total Syntheses.
Satoshi Matsumiya, Masumi Iwai, Ken Nunettsu Asaba, Ryota Wada, Kazunori Miyaji, Mariko Kitajima

J Org Chem· September 2025

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Modified Bohlmann-Rahtz Pyridine Synthesis for Cyclic Ketones.
Keita Ikeno, Haruna Oku, Kenta Rakumitsu, Mariko Kitajima, Hayato Ishikawa

Chemistry· April 2025

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Bioinspired Total Synthesis and Structural Reidentification of Alstrostines.
Daiki Hiruma, Akiho Yoshidome, Kenta Rakumitsu, Mariko Kitajima, Yuki Hitora

Chemistry· March 2025

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New Entries in Organocatalysts from an Alkaloid Library; Development of Aminal Catalysis for a Michael Reaction Based on Calycanthine.
Kyosuke Yamanishi, Gin Ashihara, Shinya Shiomi, Shingo Harada, Mariko Kitajima

J Am Chem Soc· October 2024

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Indole C5-Selective Bromination of Indolo[2,3-a]quinolizidine Alkaloids via In Situ-Generated Indoline Intermediate.
Go Yoshimura, Jukiya Sakamoto, Mariko Kitajima, Hayato Ishikawa

Chemistry· June 2024

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Denosumab-induced hypocalcemia in patients with solid tumors and renal dysfunction: a multicenter, retrospective, observational study.
Kazuyo Nakamura, Michihiro Kaya, Yuki Yanagisawa, Keisuke Yamamoto, Nana Takayashiki, Mariko Kitajima

BMC Cancer· February 2024

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Bioinspired Total Synthesis of (+)-Kopsiyunnanine B.
Sho Imaoka, Yuta Nakashima, Mariko Kitajima, Hayato Ishikawa

Chem Pharm Bull (Tokyo)· January 2024

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Sticklac-Derived Natural Compounds Inhibiting RNase H Activity of HIV-1 Reverse Transcriptase.
Yuma Ito, Huiyan Lu, Mariko Kitajima, Hayato Ishikawa, Yoshihiro Nakata

J Nat Prod· November 2023

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Enantioselective Total Syntheses of (-)-Silicine and (-)-20-Episilicine.
Yoshihiro Ataka, Mariko Kitajima, Hayato Ishikawa

Org Lett· October 2023

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Total Syntheses of (+)-Villocarine A, (-)-Apogeissoschizine, and (+)-Geissoschizine.
Jukiya Sakamoto, Mariko Kitajima, Hayato Ishikawa

Chemistry· March 2023

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Asymmetric Total Synthesis of Senepodine F.
Yuta Nakashima, Taichi Inoshita, Mariko Kitajima, Hayato Ishikawa

Org Lett· February 2023

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Divergent Total Syntheses of Hetero-Oligomeric Iridoid Glycosides.
Akiho Yoshidome, Jukiya Sakamoto, Mizuki Kohara, Shinya Shiomi, Mako Hokaguchi, Mariko Kitajima

Org Lett· January 2023

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Recent studies on chemical constituents of Ophiorrhiza plants.
Mariko Kitajima

J Nat Med· September 2022

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Asymmetric Total Syntheses of Mitragynine, Speciogynine, and 7-Hydroxymitragynine.
Jukiya Sakamoto, Mariko Kitajima, Hayato Ishikawa

Chem Pharm Bull (Tokyo)· September 2022

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Identification of a regiospecific -oxygenase for the production of marasmin in traditional medicinal plant .
Jichen Wang, Hideyuki Suzuki, Nanako Nakashima, Mariko Kitajima, Hiromitsu Takayama

Plant Biotechnol (Tokyo)· September 2022

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Asymmetric Total Synthesis and Structure Elucidation of Huperzine H.
Shinya Shiomi, Kaewsri Wilailak, Wataru Soutome, Hiromitsu Takayama, Mariko Kitajima

J Org Chem· March 2022

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Secorubenine, a Monoterpenoid Indole Alkaloid Glycoside from Adina rubescens: Isolation, Structure Elucidation, and Enantioselective Total Synthesis.
Nanako Nakashima, Jukiya Sakamoto, Kenta Rakumitsu, Mariko Kitajima, Lia Dewi Juliawaty

Chem Pharm Bull (Tokyo)· February 2022

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Asymmetric Total Synthesis of Biphenylquinolizidine Alkaloids 4″--Demethyllythridine and 14--4″--Demethyllythridine.
Haruka Kawabata, Taku Hirama, Tomomi Yanagisawa, Keigo Sato, Noriyuki Kogure, Mariko Kitajima

Org Lett· October 2019

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Total Synthesis of (-)-14-Hydroxygelsenicine and Six Biogenetically Related Alkaloids.
Atsushi Saito, Noriyuki Kogure, Mariko Kitajima, Hiromitsu Takayama

Org Lett· September 2019

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New otonecine-type pyrrolizidine alkaloid from Petasites japonicus.
Mariko Kitajima, Kei Okabe, Megumi Yoshida, Ryo Nakabayashi, Kazuki Saito

J Nat Med· June 2019

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Asymmetric Total Synthesis of Fawcettimine-Type Lycopodium Alkaloid, Lycopoclavamine-A.
Hiroki Kaneko, Shunsuke Takahashi, Noriyuki Kogure, Mariko Kitajima, Hiromitsu Takayama

J Org Chem· May 2019

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Total Syntheses of Pleiocarpamine, Normavacurine, and C-Mavacurine.
Keigo Sato, Noriyuki Kogure, Mariko Kitajima, Hiromitsu Takayama

Org Lett· May 2019

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Asymmetric Total Synthesis and Evaluation of Antitumor Activity of Ophiorrhisine A and Its Derivatives.
Tadayoshi Onozawa, Mariko Kitajima, Noriyuki Kogure, Hiromitsu Takayama

J Org Chem· December 2018

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Protective Effects of Brain Infarction by -Acetylcysteine Derivatives.
Takeshi Uemura, Kenta Watanabe, Kenta Ko, Kyohei Higashi, Noriyuki Kogure, Mariko Kitajima

Stroke· July 2018

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