+++Helvetica Chimica Acta. Спасибо!!!

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Уважаемые коллеги, помогите, пожалуйста, найти статьи:
1. Helvetica Chimica Acta, 2012, vol. 95, Issue 10, 1730-1757
Some Aspects of the Chemistry of Nitro Compounds
Samir Z. Zard

DOI:

http://dx.doi.org/10.1002/hlca.201200324

2. Helvetica Chimica Acta, 2012, vol. 95, Issue 9, 1561-1565
One-Pot Synthesis of 1,4-Dihydro-2-thioxo-2H-3,1-benzoxazine-4-acetic Acid Derivatives by the Reaction of 2-Isothiocyanatophenyl Ketones with Lithium Enolates of Acetates and Tertiary Acetamides
Kazuhiro Kobayashi, Shuhei Fukamachi, Akihiro Kobayashi and Aogu Gotoh

DOI:

http://dx.doi.org/10.1002/hlca.201200096

3. Helvetica Chimica Acta, 2012, vol. 95, Issue 8, 1449-1454
Alkaloids from the Stems of Glycosmis pentaphylla
Guang-Zhong Yang, Yi Wu and Yu Chen

DOI:

http://dx.doi.org/10.1002/hlca.201200027

4. Helvetica Chimica Acta, 2013, vol. 96, Issue 1, 135-141
Synthesis of Thienyl-Substituted Dihydrofuran Compounds Promoted by Manganese(III) Acetate

DOI:

http://dx.doi.org/10.1002/hlca.201200098

Заранее благодарю.

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Огромное Вам спасибо!!!