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. 2014 Oct 30;19(11):17478–17535. doi: 10.3390/molecules191117478
Cpd R1 R2 R3 R4 R5
111 =O =O α-CH3 α-OH CH3
112 =O α-O-Et β-CH3 ξ-OH CH2OH
113 =O =O β-CH3 ξ-OH CH2OH
114 =O α-O-CH3 β-CH3 ξ-OH CH2OH
115 β-OH =O β-CH3 ξ-OH CH2OH
116 β-OH =O α-CH3 α-OH CH3