1,7-Dihydroxyheptane 1,7-HEPTANEDIOL 4-01-00-02580 (Beilstein Handbook Reference) 629-30-1 AI3-11199 BRN 1633482 EINECS 211-085-0 Heptane-1,7-diol NSC 3821 alpha,omega-Heptanediol