The [C-NMR.sup.13] chemical shifts for Ths-2 are also in agreement with those of CO-1, an extracellular glucan described from the fungus Cordyceps ophioglossoides (Yamada et al.
Yamada H, Kawaguchi N, Ohmori T, Takeshita Y, Taneya SI, Miyazaki T (1984) Structure and antitumor activity of an alkali-soluble polysaccharide from Cordyceps ophioglossoides.CarbohydrRes 125:107-115