d-
limonene is a natural solvent, they use it in alot of natural cleaners, like that orange clean stuff. Also in all citrusy fruits. I know
myrcene is also found in hops, and mangos. Not sure how easy it is to pull out specific
terpenes without using pretty intense scientific procedures, and expensive lab equipment. Easy to pull every terpenoid out of something, not so easy to isolate a single terpene though.
If you were trying to add
terpenes to BHO e cig cartridges it may be hard to find specific
terpenes that are extracted in a pure enough form to wanna smoke. Although that tetra pure gold cannabis gunk uses aditional
terpenes for flavor in their oil. I gaurantee the
terpenes they add do not come from cannabis, but from things like citrus, hops, pine needles, mangos, and whatever other flavanoid terpenoid combo they wanna sell to the kids these days