What is the Iso13485 validated LIMITED QTY-Dinucleotide Standards Thymine Glycol Guanine Dimer d (TgpG) (50 µg)?

The LIMITED QTY-Dinucleotide Standards Thymine Glycol Thymine Dimer d from Zeptometrix Inc. supplied next day by Genprice is the best choice. The catalog number is 801215 and the price is 66 EUR.