The present invention provides a protected nucleotide for elongation, which can be purified efficiently and in a high yield by a liquid-liquid extraction operation, and can achieve an oligonucleotide production method by a phosphoramidite method.
It has been found that the above-mentioned problem can be solved by a particular oligonucleotide comprising a protected base and/or particular oligonucleotide protected by a branched chain-containing aromatic group at 3′-position.
N-Tris(hydroxymethyl)methylfatty acid amides and cosmetic compositions containing same
申请人:KAO CORPORATION
公开号:EP0450527A2
公开(公告)日:1991-10-09
An N-tris(hydroxymethyl)methyl-fatty acid amide of formula (I):
where R1 is a branched alkyl group containing 4 to 27 carbon atoms, and a method for producing the fatty acid amide are disclosed. A cosmetic composition containing the novel amide and other amides, and a method of moisturizing a cosmetic composition using the novel amide and other amides are also disclosed.