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. 2003 Jan 1;31(1):262–265. doi: 10.1093/nar/gkg048

Table 2. Ten biotransformation formations rules for guided pathway prediction.

bt0001: Primary alcohol→aldehyde
bt0002: Secondary alcohol→ketone
bt0003: Aldehyde→carboxylic acid
bt0004: Unsubstituted mono-aromatic→3,4 cis-dihydrodiol
bt0005: Unsubstituted mono-aromatic→1,2 cis-dihydrodiol
bt0006: 1,2 cis-dihydrodiol→1,2 dihydroxy catechol
bt0007: 3,4 cis-dihydrodiol→3,4 dihydroxy catechol
bt0008: 1,2 Dihydroxy→ring cleavage on one side of the two OH
bt0009: 1,2 Dihydroxy→ring cleavage between the two OH
bt0010: 1,2 Dihydroxy→ring cleavage on the other side of the two OH

The most recent list of rules is found at: http://umbbd.ahc.umn.edu/predict/alllist.html.