Begin with a five-member ring containing two carbons and three adjacent nitrogens (a 1,2,3-triazole), and number the ring so that N-1 is followed by N-2, N-3, C-4, and C-5. At N-1, attach a benzene ring that bears one chlorine substituent para to the point of attachment and a methyl group ortho to the point of attachment. At C-4, attach an sp3 carbon substituent that carries a hydroxyl group, an ethyl group, and one hydrogen.