... 3-(6-O-(6-Deoxy-alpha-L-mannopyranosyl)-beta- D-glucopyranoside)3,5- dihydroxy-3',4',7-tris(2- hydroxyethoxy)fflavone; ... melting at 190 C. Rutin is classified as vitamin P which increases the strength of the walls of the blood ... capillaries and regulates their permeability. Others classified as vitamin P are catechin, citrin, eriodictin, hesperetin, hesperidin, nobiletin, quercetin, sinensetin, ...