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        Isolation, Physicochemical Properties and Toxicities of Territrem A' and B'

        Kuo Huang Ling,Fu Chuo Peng,Bai Jiun Chen 한국생약학회 1986 생약학회지 Vol.17 No.2

        We have isolated two new metabolites of territrem, designated as territrem A`^* (TRA`; C_(28)H_(30)O_(10) and B`(TRB`; C<sub>29</sub>H<sub>34</sub>O_(10)) from chloroform extract of rice culture of Aspergillus terreus 23-1, using the same isolation procedure as that for territrem A, B and C(TRA, TRB, TRC). The present isolation procedure gave about 5 ㎎ of TRA` and 10 ㎎ of TRB` from 4 ㎏ of rice culture per batch. Analysis of the high resolution mass spectrum showed that the molecular composition of TRA` and TRB` are C_(28)H_(30)O_(10) and C<sub>29</sub>H<sub>34</sub>O_(10) respectively, Some results of physicochemical properties were presented in this paper. Single crystal X-ray diffractometry of TRB` showed that the three dimensional structure of TRB` has not changed significantly from that of TRB (C<sub>29</sub>H<sub>34</sub>O<sub>9</sub>), except for the insertion of one oxygen atom into TRB to make additional pyran in the E-ring. It is also suggested that the aromatic moiety of TRA` is similar to that of TRA (C_(28)H_(30)O<sub>9</sub>) and the rest non-aromatic portions resemble to those of TRB`. The tremorgenic activity, lethality and inhibitory effect on acetylcholine esterase of TRA` and TRB` are greatly reduced comparing to that of TRA and TRB.

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