I will do as you say.
But it looks like the business that was here a few years ago had number 189.
https://instituts.nosavis.be/institut/bruxelles+capitale-01/jette-1090/artmantic+sprl-227/

Is it possible that 40 Lenoir is for the private door, and 189 de Smet de Naeyer for the doctor’s office on the corner?