5.5
[1]. D A Evans, et al. An aldol-based approach to the asymmetric synthesis of L-callipeltose, the deoxyamino sugar of L-callipeltoside A. Org Lett. 21 Oct 4;(2):1-6.
H2-H15-H19-H5
P261-P264-P27-P271-P28-P2+P52-P4+P4-P5+P51+P8-P-P62+P64-P4+P2-P45-P51
GHS7