57.5
[1]. Zha-Jun Zhan, et al. A Novel ent-kaurane Diterpenoid from Pteris Semipinnata. Journal of Chemical Research, 009(), 149-150.
H0-H15-H19-H5
P61-P64-P70-P71-P80-P0+P5-P04+P40-P0-P6+P64-P405-P501
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