Composition #2: Hu, K., Yao, XS., Dong, AJ., Kobayashi, H., Iwasaki, S., Jing, YK. A new pregnane glycoside from Dioscorea collettii var. hypoglauca. JOURNAL OF NATURAL PRODUCTS, 1999, vol. 62, no. 2, p. 299–301. DOI: 10.1021/np980101z.
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