1,3,7-Trimethoxyxanthone 3722-54-1 5-18-04-00498 (Beilstein Handbook Reference) 9H-Xanthen-9-one, 1,3,7-trimethoxy- BRN 0291562 CCRIS 4035 Xanthen-9-one, 1,3,7-trimethoxy-