tumor producing 1-indanone glycosides from bracken fern (Pteridium aquilinum) in Chemline RN for pteroside A is 35910-15-7; RN for pteroside B is 29774-74-1; RN for pteroside C is 35910-17-9; RN for pteroside D is 35943-38-5; RN for pteroside P is 54854-88-5; RN for pteroside Z is 35943-37-4