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. Author manuscript; available in PMC: 2020 Feb 1.
Published in final edited form as: Free Radic Biol Med. 2018 Dec 19;131:332–344. doi: 10.1016/j.freeradbiomed.2018.12.023

Figure 1.

Figure 1.

(A) The structures of EGCG (1) and 4'-NH2-EGCG (2), the synthetic conditions, and the key HMBC correlations of 4'-NH2-EGCG. (B) The proposed structures of the methylglyoxal (MGO), malondialdehyde (MDA), and trans-4-hydroxy-2-nonenal (4-HNE) conjugated metabolites of EGCG and 4'-NH2-EGCG.