four
【医】 quadri-; Quat; quattuor; tetra-
iodine
【化】 iodonium
【医】 I; iodine; iodum
【化】 hexamethylene-tetramine; hexamethylenetetramine; hexamine; methenamine
urotropine
【医】 acetoform; ammonioformaldehyde; cystamin; hexamethylenamine
hexamethylenetetramine; hexamine; methenamine; naphthamine; urotropine