It relates to spirocyclic compounds of formula (I), or pharmaceutically or veterinary acceptable salts thereof, or any stereoisomers either of the compounds of formula (I) or of their pharmaceutically or veterinary acceptable salts, wherein A and B form a spirocyclic ring system wherein the spiro atom connecting A and B is a carbon atom and wherein A is a known 3- to 8-membered carbocyclic or heterocyclic monocyclic ring or a known 6- to 18-membered carbocyclic or heterocyclic polycyclic ring system; B is a known 4- to 7-membered carbocyclic or heterocyclic monocyclic ring; C is phenyl or a known 5- to 6-membered heteroaromatic ring; and R1-R7 are as defined herein. It also relates to a process for their preparation, as well as to the intermediates used in this process; to pharmaceutical or veterinary compositions containing them, and to their use in medicine, in particular as antifibrinolytic and antihemorragic agents.