Disclosed are novel cathepsin S, K, F, L and B reversible inhibitory compounds of the formulas, , and further defined herein. A fuel bleeding opening is formed in a peripheral wall part of the fuel filler port device and an arrester peripheral wall part. The insulating layer containing a boron element or an aluminum element is formed by a sputtering method using a silicon target or a silicon oxide target containing a boron element or an aluminum element.