Osladine is a high-intensity sweetener isolated from the rhizome of Polypodium vulgare.

[3] It is a saponin, sapogenin steroid glycoside, 500 times sweeter than sucrose.

[4] A related compound, polypodoside A, has been identified from Polypodium glycyrrhiza and is 600 times sweeter than a sucrose solution at 6%.

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