All Functions: astringent, humectant, skin conditioning
Description: pna-19 carboxyethyl fluorene is the modified polymer of pna containing 17 nucleobases consisting of adenine, aminoethoxymethyl pyrrolopyrimidone, aminohexyl guanine, aminopentyl aminoadenine, cytosine, guanine and thymine. it conforms generally to the following formula, where r represents a nucleobase: