Benzoquinone

Benzoquinone is a quinone with a single benzene ring, of which there are only two:

• 1,4-Benzoquinone, most commonly (also para-benzoquinone, p-benzoquinone, para-quinone, or just quinone)
• 1,2-Benzoquinone, less commonly (also ortho-benzoquinone, o-benzoquinone, ortho-quinone)

It has been found in the rhizomes of Iris kemaonensis.^[1]

References

1. Singh, N.; Mahmood, U.; Kaul, V.K.; Gupta, A.P.; Jirovetz, L. (January 2006). "A new alkylated benzoquinone from rhizomes of Iris kumaonensis.". Natural Product Research (Nat. Prod. Res.) 20 (1): 75–78. Retrieved 3 August 2015.