QS Zhao

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HD Sun

Kunming Institute of Botany

ZW Lin

Kunming Institute of Botany

SH Li

Dalian Maritime University

Quan‐Bin Han

Sichuan Agricultural University

LY Peng

Tongji University

Hongjie Zhang

North China Electric Power University

Xu Jf

Xi'an Technological University

Ah Zhao

Wang Fs

Tianjin Medical University

Wensheng Xiang

Chinese Academy of Agricultural Sciences

Cooperative Institutions

Chinese Academy of Sciences

Kunming Institute of Botany

North China Electric Power University

Tsinghua University

Hong Kong Baptist University

Ministry of Education of the People's Republic of China

Liaoning University of Traditional Chinese Medicine

Shanghai Institute of Materia Medica

China Electric Power Research Institute

Changchun Institute of Applied Chemistry

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Two new ent-kaurane diterpenoids from Isodon adenantha

Bei Jiang JC Xu Hana Yang QS Zhao HD Sun

Two new ent-kaurane diterpenoids, adenanthins B (1) and C (2), were isolated from the EtOAc extract of Isodon adenantha. Their structures were elucidated by spectroscopic evidences.

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A new abietane diterpenoid from Orthosiphon wulfenioides

Wensheng Xiang SH Li QS Zhao Z Na BH Jiang

A new abietane diterpenoid, orthosiphonol (11-methoxy-12, 14-dihydroxy-8, 11, 13-abieta trien-7-one) (1) together with known 11-hydroxysugiol (2) were isolated from Orthosiphon wulfenioides. Their structures were determined on the basis of spectroscopic evidence.

Abietane

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A new taxoid from leaves and branches of Taxus chinensis

Wang Fs LY Peng Yue Zhao QS Zhao Kuang Gu

A new taxoid, 2-deacetyl-2alpha, 14beta-dihydroxybaccatin IV (1), was isolated from the leaves and branches of Taxus chinensis together with the known compound baccatin IV (2). The structure of the new compound was elucidated by spectroscopic techniques. The detailed C-13 NMR assignments of baccatin IV are reported for the first time.

Taxoid

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ent-kaurane diterpenoids from Isodon rubescens collected in Guizhou Province

Quan‐Bin Han QS Zhao SH Li LY Peng HD Sun

Twelve 6, 7-seco-7, 20-olide-ent-kaurane diterpenoids, including seven new compounds named guidongnins B similar to H (1 similar to 7) and five known ones identified as ludongnin A (8), ludongnin B (9), guidongnin (10), angustifolin (11) and 6-epiangustifolin (12), were isolated from Isodon rubescens collected in Guizhou Province. On the basis of spectroscopic evidences, the new compounds were elucidated as 16 ( R)-methyl-6, 7-seco-6, 19; 7, 20-diolide-ent-kaur-15-one (1), 16 (R)-methyl-11alpha-hydroxy-6, 7-seco-6, 19; 7,20-diolide-ent-kaur-15-one (2), 16 (S)-hydroxymethyl-11alpha-hydroxy-6,7-seco-6,19;7,20-diolide-ent-kaur-15-one (3), 16(R)-methyl-6alpha-hydroxy-6, 7-seco-6,19-epoxy-7, 20-olide-ent-kaur-15-one (4), 16 (R)-methyl-6beta-hydroxy-6, 7-seco-6, 19-epoxy-7,20-olideent-kaur-15-one (5), 6beta,15beta-dihydroxy-6,7-seco-6,19-epoxy-7,20-olide-enx-kaur-16-ene (6) and 16(R)-methyl-19beta-oxymethyl-6,7-seco-6,19-epoxy-7,20-olide-ent-kaur-15-one (7), respectively. The structure of ludongnin B was revised by 2D-NMR spectra and the name of guidongnin (10) was renamed guidongnin A (10).

Hydroxymethyl

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A novel-spiro-compound from Clerodendrum indicum

Jiayin Tian QS Zhao ZW Lin HD Sun

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Two new ent-kaurane diterpenoids from Isodon japonica

Zhang Jx Quan‐Bin Han QS Zhao SH Li HD Sun

Two new ent-kauranoids, named maoyecrystals A (1) and B (2), were isolated from the EtOAc extract of the dried leaves of Isodon japonica (Burman f.) Hara collected in Tongbai mountains, Henan Province. Their structures were determined on the basis of spectral data, especially by 2D NMR.

Spectral Analysis

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Two new abietane quinones from Isodon lophanthoides var. micranthus

Ah Zhao SH Li Li YW QB Huan QS Zhao

The structures of two new abietane quinones, named micranthins A and B, were determined to be 7alpha-methoxy-14, 16-epoxy-8, 13-abietadiene-11, 12-dione (1) and 16-acetoxy-6, 7-dehydroroyleanone (2) respectively, which were isolated from Isodon lophanthoides var. micranthus.

Abietane

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A novel compound from Ceratostigma minus

JM Yue Yuanying Zhao QS Zhao HM Wu Xu Jf

A novel compound, plumbocatechin A 1, was isolated from the whole plant of Ceratostigma minus. The structural elucidation of 1 was mainly achieved by 2D-NMR techniques.

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