1,4-Naphthalenedione, 2-hydroxy- 1,4-Naphthoquinone, 2-hydroxy- 2-Hydroxy-1,4-naphthoquinone 2-Hydroxynaphthoquinone 83-72-7 C.I. 75480 C.I. Natural Orange 6 Flower of Paradise Hana Henna Lawson Lawsone Mehendi Mendi NSC27285