..'kif' is the product obtained by freezing off the cannabinoid-rich pollen of the flowers, you could say it is a form of hashish.
Apparantely there is a confusing nomenclature problem with the THC-V. According to the article you refer to "it states that 1,2-dimethylheptyl or 1,1-dimethylheptyl analogues (coined
THC-V in the overview) are about 500 times more potent than THC".
But
delta-9-
THCV (no "-") is apparantely also known as tetrahydrocannabivarin, or the propyl homologue of THC (1 carbon shorter). This occurs, contrary to the dimethylheptyl homologue, in nature as a minor product next to the commonly found cannabinoids in some cannabis variant (especially the South-African ones IIRC).
Now I was under the impression that a shorter side-chain homologue also gave shorter lasting effects, as opposed to THC-V, so it is quite clear that this kind of nomenclature can be problematic.
interesting read:
delta-9-Tetrahydrocannabivarin (delta-9-THCV) as a Marker for the Ingestion of Cannabis versus MarinolJournal of Analytical Toxicology, Volume 23, Number 3, May/June 1999, pp.222-224.
https://www.jatox.com/abstracts/1999/may-june/222-elsohly.htm