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- [3] ECDYSTERONE AND ECDYSONE FROM POLYPODIUM-VIRGINIANUM LLOYDIA-THE JOURNAL OF NATURAL PRODUCTS, 1976, 39 (04): : 246 - 247
- [9] TETRACYCLIC TRITERPENE ALCOHOLS AND STEROLS OF FERN POLYPODIUM-VULGARE L COMPTES RENDUS HEBDOMADAIRES DES SEANCES DE L ACADEMIE DES SCIENCES SERIE D, 1970, 271 (10): : 862 - &