I would like to add a pine note (preferably as a middle note) to a fragrance I am working on, but I'm reading some conflicting information, which is confusing. I was hoping you all could help clarify it for me. The pine essential oils I have looked at range from a top note to a base note. The scotch pine on the Perfumer's Apprentice site is listed as a base note, but then the pine oil on Perfumers World says it lasts 30 minutes on a smelling strip. Any recommendations for a good pine essential oil or building a good pine note/accord would be greatly appreciated. Some aroma chemicals I am thinking about using in it are terpinolene, nopyl acetate, cyclacet, and alpha & beta pinene. Thanks!