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. 2018 May 15;6(5):757–766. doi: 10.3889/oamjms.2018.168

Table 8.

Method employed, retention time, and ultraviolet absorption of betulinic acid, quercetin and ethanolic extract of Ziziphus jujube

Compound Method Constituent Retention Time (min) UV Absorption (nm)
Standard 1 Zhang et al. 2008 Betulinic Acid 42.169 205
EEZJ Zhang et al. 2008 Betulinic Acid 42.169 205
Standard 2 Guo et al. 2011 Quercetin 16.821 205
EEZJ Guo et al. 2011 Quercetin 16.821 205