(1,1'-Bicyclopent(b)indole)-2,2'(3H,3'H)-dione, 3,3'-bis((4-hydroxyphenyl)methylene)- 152075-98-4 3,3'-Bis((4-hydroxyphenyl)methylene)-(1,1'-bicyclopent(b)indole)-2,2'(3H,3'H)-dione Scytonemin