Composition #1: Marker, Russell E., Turner, D. L., Shabica, Antony C., Jones, Eldon M., Krueger, John., Surmatis, J. D. Sterols. CVII. Steroidal sapogenins of Aletris, Asparagus and Lilium.. Journal of the American Chemical Society, 1940, vol. 62, p. 2620–1. DOI: 10.1021/ja01867a011.
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