Primin is a natural product stored in trichomes on leaves and stems of Primula obconica, with antimicrobial and antitumour properties[1][2].
[1]. Horper, W., et al. Biosynthesis of primin and miconidin and its derivatives. Phytochemistry, 1996;41(2), 451-456. [2]. Brondani DJ, et al. Synthesis and antitumour activity of the Primin (2-methoxy-6-n-pentyl-1,4-benzoquinone) and analogues. Med Chem. 2007 Jul;3(4):369-72.