A new naphthoquinoneimine derivative from the marine algal-derived endophytic fungus Aspergillus niger EN-13

Cultivation of an endophytic fungus Aspergillus niger EN-13 that was isolated from the inner tissue of the marine brown alga Colpomenia sinuosa resulted in the characterization of a new naphthoquinoneimine derivative, namely, 5,7-dihydroxy-2-[1-（4- methoxy-6-oxo-6H-pyran-2-yl）-2-phenylethylamino]-[ 1,4]naphthoquinone. The structure of the new compound was established on the basis of various NMR spectroscopic analyses including 2D NMR techniques, El-MS, and HR-ESI-MS. This compound displayed moderate antifungal activity.

A New Acylated Iridoid Glucoside from Avicennia marina

A new acylated iridoid glucoside, namely, 2＇-O-（5-phenyl-2E, 4E-pentadienoyl）- mussaenosidic acid, was isolated from the aerial parts of the mangrove plant Avicennia marina. The structure of the new compound was established on the basis of various NMR spectroscopic analyses, including 2D NMR techniques （^1H-^1H COSY, HMQC, and HMBC） and HR-FAB-MS. This compound displayed moderate antioxidant activity.

A New Diterpene from Spiraea japonica var. ovalifolia

A new diterpenoid, 15-O-acetylspiraminol (1), was isolated from the aerial parts of Spireae japonica L. f. var. ovalifolia. The structure was charaterized mainly based on spectral analysis.

Two New Diterpene Alkaloids from the Roots of Spiraea japonica var.Acuta

Chemical investigation on the ethanol extract from the roots of Spiraea japonica var. acuta resulted in the isolation of two new diterpene alkaloids named spiratines A and B (1-2), respectively.

Spiramide, a New Diterpene Amide from the Roots of Spiraea japonica var. acuta

Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 was carried out on the basis of 1D and 2D NMR spectra.

Two new brominated diterpenes from Laurencia decumbens

二新 brominated diterpenes，也就是 laurendecumtriol 和 11-deacetylpinnaterpene 6 号元素碳的化学符号，从海洋的红水藻 Laurencia decumbens 被孤立并且识别。他们的结构根据各种各样的 NMR 分光镜的技术和 HR ESI MS 分析被建立。

Laurenidificin,a new brominated C_(15)-acetogenin from the marine red alga Laurencia nidifica

A new brominated C15-acetogenin, namely, laurenidificin, was isolated from the marine red alga Laurencia nidifica. Its structure was determined on the basis of spectroscopic methods.

A new rearranged chamigrane sesquiterpene from Laurencia okamurai

A new rearranged charnigrane sesquiterpene, named laurenokamurin, was isolated from the marine red alga Laurencia okamurai. Its structure was determined on the basis of spectroscopic methods.