Amino-acid-base glycol derivatives for laboratory or research use; amino-acid-base glycol derivatives for use in the manufacture of cosmetics; chemical agents for use as moisturizing preparations, wetting preparations or softening preparations in the manufacture of cosmetics; ascorbic-acid-base glycol derivatives for laboratory and research use; ascorbic-acid-base glycol derivatives for use in the manufacture of cosmetics; antioxidant preparations for use in the manufacture of cosmetics; anti...