| 1. | Vitamin K is a derivative of 1, 4-naphthoquinone.
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| 2. | Chemically, it is a derivative of naphthoquinone, related to vitamin K.
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| 3. | The chemical structure as a naphthoquinone derivative was first determined by Brockmann in 1936.
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| 4. | Several isomeric naphthoquinones are known, notably benzoquinone.
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| 5. | Lapachol, a yellow, skin-irritating naphthoquinone, is often found in the wood.
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| 6. | The unqualified term " hydroxynaphthoquinone " usually means a derivative of 1, 4-naphthoquinone.
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| 7. | The unqualified term " dihydroxynaphthoquinone " usually means a derivative of 1, 4-naphthoquinone.
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| 8. | Naphthoquinone derivatives have significant pharmacological properties.
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| 9. | "' Xylindein "'is a quinone pigment, a dimeric naphthoquinone derivative.
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| 10. | A 1998 article reported that naphthoquinones originating from " N . thorelii " showed antimalarial activity.
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