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Table 2 BLEU scores analysis

From: STOUT: SMILES to IUPAC names using neural machine translation

Training dataset size 30 Mio 60 Mio
Average BLEU score 0.89 0.94
Total number of strings with BLEU 1.0 52.48% 66.65%
BLEU-1 0.92 0.95
BLEU-2 0.90 0.94
BLEU-3 0.88 0.93
BLEU-4 0.86 0.92