The present invention provides stable lipid-based pharmaceutical formulations containing ivermectin, praziquantel and pyrantel pamoate, and methods for preparing the formulations. The invention relates to the use of these divinyl ether derivatives as perfuming or flavoring ingredients, as well as to the perfuming compositions and consumer articles containing them. The image pickup range of the video cameras is adjusted so that it is out of the range on the floor surface illuminated by the corresponding illuminator, while the information inputting person is within the image pickup range. The variable joint is supported by a reaction surface that is the operative face of a piston and cylinder assembly seated on a shoulder fast to a shank of the threaded fastener. In the fixed state, the proximal and distal portions contact each other and relative movement is thereby impeded.