@article{4bf42028c19a438b8e077527909762f0,
title = "Yezo'otogirins A-C, new tricyclic terpenoids from Hypericum yezoense",
abstract = "Three new tricyclic terpenoids, yezo'otogirins A-C (1-3), were isolated from aerial parts of Hypericum yezoense. The structures including absolute stereochemistry of 1-3 were elucidated from the spectroscopic data and conformational analysis.",
author = "Naonobu Tanaka and Yuka Kakuguchi and Haruaki Ishiyama and Takaaki Kubota and Jun'ichi Kobayashi",
note = "Funding Information: We thank N. Yoshida, Health Sciences University of Hokkaido, for collection and botanical identification of the plant, S. Oka and A. Tokumitsu Center for Instrumental Analysis, Hokkaido University, for measurements of HRESIMS and HREIMS. This work was partly supported by a grant from the Kuribayashi Foundation and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan. ",
year = "2009",
month = aug,
day = "18",
doi = "10.1016/j.tetlet.2009.06.021",
language = "English",
volume = "50",
pages = "4747--4750",
journal = "Tetrahedron Letters",
issn = "0040-4039",
publisher = "Elsevier Limited",
number = "33",
}