In this step, the adduct from stepl is fluorinated. 在這一步，將步驟1的加合產物進行氟化。
Deoxyribonacleic acid (DNA) adduct is always one of the frontier and spotlight fields in the studies of environmental science, medicine and ecological toxicology in the recent decade. 脫氧核糖核酸(DNA)加合物近十多年來一直是環境科學、醫學和生態毒理學的前沿和熱點研究領域之一。