I've look around on the web and found a small article on wikipedia about this here: Tetrahydrocannabivarin - Wikipedia, the free encyclopedia
Look like it is a part of some plants. I guess we have all experience at one point of the other the buzz from that active component... I can't say if there is a different high from the THCV but I guess so as it does not have the same molecular formula, if anyone knows more I'll like to learn about it, let me know !