ID 5.5.1.32 DE 12-epi-hapalindole U synthase. CA 3-geranyl-3-[(Z)-2-isocyanoethenyl]-1H-indole = 12-epi-hapalindole U. CC -!- The enzyme, characterized from the cyanobacterium Fischerella ambigua CC UTEX 1903, forms the core structure of the 12-epi-hapalindole family CC of alkaloids. //