Ten undescribed coumarins, including five pairs of enantiomers (±)-toddacoumalin C (3a/3b), (±)-toddacoumalin D (4a/4b), (±)-toddacoumalin E (5a/5b), (±)-toddacoumalin F (6a/6b), and (±)-toddacoumalin I (9a/9b), along with 13 known compounds (11-23) were ... ...

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