Screening of an extract of Hydnellum peckii revealed the presence of an effective anticoagulant , named atromentin ( 2 @,@ 5 @-@ dihydroxy @-@ 3 @,@ 6 @-@ bis ( 4 @-@ hydroxyphenyl ) -1,4 @-@ benzoquinone ) , and similar in biological activity to the well @-@ known anticoagulant heparin . Atromentin also possess antibacterial activity , inhibiting the enzyme enoyl @-@ acyl carrier protein reductase ( essential for the biosynthesis of fatty acids ) in the bacteria Streptococcus pneumoniae .