รบกวนโหลดเปเปอร์ครับผม

1) A flavanonol rhamnoside from Hypericum japonicum
https://www.sciencedirect.com/science/article/abs/pii/S0031942200982773

2)The specification of asymmetric configuration in organic chemistry
https://link.springer.com/article/10.1007/BF02157171

email; tpromgool@gmail.com
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