Abstract
Herein, we reported the phytochemical investigation of whole thallus Sumatran lichen, Stereocaulon graminosum Schaer, and isolated a mono aromatic compound, ethyl haematommate (1). The structure of compound 1 have been established based on spectroscopic data and confirmed by single crystal X-ray structure analysis.
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Fig. 3.
Thermal ellipsoid structures of compound 1 with atom labelling drawn at a 50% probability level. The asymmetric unit contained one molecule of compound 1.
![nps-24-115f3.tif](/upload/SynapseXML/0228nps/thumb/nps-24-115f3.gif)
Fig. 4.
The π–π interactions in compound 1 create a layered architecture propagating in the (001) plane. Hydrogen atoms are omitted for clarity.
![nps-24-115f4.tif](/upload/SynapseXML/0228nps/thumb/nps-24-115f4.gif)
Table 1.
1H- and 13C-NMR data of ethyl haematommate (1) in CDCl3 (δ in ppm, 500 MHz for 1H and 125 MHz for 13C)a
Table 2.
Crystallographic data of compound 1