2-Methylnaphthalene-1,4-diol 481-85-6 Oprea1_703615 1,4-NAPHTHALENEDIOL, 2-METHYL- 2-Methyl-1,4-naphthohydroquinone 2-Methyl-1,4-naphthoquinol 2-Methylhydronaphthoquinone 4-06-00-06581 (Beilstein Handbook Reference) BRN 1638194 Dihydrovitamin K3 EINECS 207-573-8 Menadiol [USAN] Methylnaphthohydroquinone Reduced menadione Reduced vitamin K3 Vitamin K3H2 NCGC00164511-01 C07126 Menadiol