4--1-pentanol-d4

4-[(7-Chloro-4-quinolinyl)amino]-1-pentanol-d4 is the deuterium labeled Hydroxychloroquine Impurity E (HY-131262). Hydroxychloroquine Impurity E is the impurity of Hydroxychloroquine. Hydroxychloroquine is a synthetic antimalarial agent which can also inhibit Toll-like receptor 7/9 (TLR7/9) signaling. Hydroxychloroquine is efficiently inhibits SARS-CoV-2 infection in vitro[3].