Pop music may be distinguished from classical or art music and from folk music, but since the term spans many rock, hip hop, rhythm and blues (R&B), country, dance and operatic pop acts, it is reasonable to say that pop music is a loosely defined category.
Exclusive partner, more commonly known as an EP (pronounced E-P), is the stage in a relationship in which you have full exclusivity with another person, with the intention of pursuing a relationship in the near future. However, this other person is not your boyfriend/girlfriend yet.
Ephedrine is a sympathomimetic amine and substituted amphetamine. It is similar in molecular structure to phenylpropanolamine, methamphetamine, and epinephrine (adrenaline). Chemically, it is an alkaloid with a phenethylamine skeleton found in various plants in the genus Ephedra (family Ephedraceae).