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. 2014 Sep 3;19(9):13775–13787. doi: 10.3390/molecules190913775

Figure 1.

Figure 1

(a) Biotransformation of prednisolone (1) to 20β-hydroxyprednisolone (2) by Penicilium lapidosum; (b) molecular structures of stereoisomers 2a and 2b.