Composition #1: Hayashi, K., Wada, K., Mitsuhashi, H., Bando, H., Takase, M., Terada, S., Koide, Y., Aiba, T., Narita, T., Mizuno, D. Antitumor Active Glycosides from Condurango Cortex. chemical and pharmaceutical bulletin, 1980, vol. 28, no. 6, p. 1954–1958. DOI: 10.1248/cpb.28.1954.
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