Acknowledgements
The authors acknowledge Program SOCRATES-Action
ERASMUS for mobility of Irena Smidova, project FRVS No
G1/1575 / 2003, FCT for funding the Research Unit 62/94
‘Quı´mica Orgaˆnica, Produtos Naturais e Agro-Alimentares’ in
University of Aveiro, and project Ministry of Education, Youth
and Sport 6046137305.