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Crystals 2011, 1(3), 128-135; doi:10.3390/cryst1030128

Crystal Structure Characterization of Natural Allantoin from Edible Lichen Umbilicaria esculenta

1
Food Science and Technology Program, Beijing Normal University–Hong Kong Baptist University United International College, Zhuhai, Guangdong 519085, China
2
Department of Food Science and Technology, Chungnam National University, Taejon 305-764, South Korea
3
Department of Chemistry, Chungnam National University, Taejon 305-764, South Korea
*
Author to whom correspondence should be addressed.
Received: 7 July 2011 / Revised: 3 August 2011 / Accepted: 8 August 2011 / Published: 9 August 2011
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Abstract

In China, Korea, and Japan, Umbilicaria esculenta is considered as both food and medicinal resources from lichen. In the current study, a prismatic crystal was first isolated from edible lichen U. esculenta via solvent fractionation. The structure of the crystalline compound was elucidated as allantoin using single-crystal X-ray crystallographic and spectroscopic techniques. In light of the wide use of synthesized allantoin in cosmetic industry as a skin protectant, the biological origin of the allantoin isolated from natural food stuff edible lichen has great potential to be developed into functional cosmetics. Current findings also provided useful information for ecologists to further explore the role of lichen and allantoin in nitrogen metabolism. View Full-Text
Keywords: Umbilicaria esculenta; edible lichen; crystal; allantoin; X-ray crystallography Umbilicaria esculenta; edible lichen; crystal; allantoin; X-ray crystallography
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Xu, B.; Sung, C.; Han, B. Crystal Structure Characterization of Natural Allantoin from Edible Lichen Umbilicaria esculenta. Crystals 2011, 1, 128-135.

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