171259-64-6 L-Proline, 1-((3-beta,20-beta)-3-(((S)-6-deoxy-2-O-((S)-6-deoxy-6-(2-(methoxycarbonyl)-1-pyrrolidinyl)-6-oxo-beta-D-glucopyranosyl)-6-(2-(methoxycarbonyl)-1-pyrrolidinyl)-6-oxo-alpha-D-glucopyranosyl)oxy)-11,29-dioxoolean-12-en-29-yl)-, methyl ester