19889-01-1 4-18-00-01266 (Beilstein Handbook Reference) Arctiopicrin Arctiopicrine Arctiopikrin BRN 0042771 Germacra-1(10),4,11(13)-trien-12-oic acid, 6-alpha,8-alpha,15-trihydroxy-, 12,6-lactone, 8-(2-methylhydracrylate)-, (+)- NSC-177853