Hederagonic acid of Dipsacus azureus. Chem Nat Compd (Engl. - Kamilov,K.M.; Putieva,Z.M.; Khalmatov,K.K.; Abubakirov,N.K. (Transl.) 1986; 22 : 741 – 2 Khim Prir Soedin, 1986)