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Table 12 Examples of chemical names with corresponding basic segments.

From: Optimising chemical named entity recognition with pre-processing analytics, knowledge-rich features and heuristics

Token

Basic segments

No. of basic segments

10-acetoxyactinidine

10, acet, oxy, actin, idine

5

methylergonovine

methyl, ergo, novi, ne

4

interleukin-2

interleukin, 2

2