Is 2,3,4,6-Tetrahydroxy-5H-benzo[7]annulen-5-one vegan?

Purpurogallin is also known as 2,3,4,6-Tetrahydroxy-5H-benzo[7]annulen-5-one.

Purpurogallin is an orange-red aglycone natural compound, a benzocycloheptenone soluble in polar organic solvents but not in water. It can be prepared by oxidation of pyrogallol and its glycoside occurs naturally in oak galls and bark.

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