例文
- All of the above are formed from flavan-3-ols, but flavan-3, 4-diols, called ( leucoanthocyanidin ) also form condensed tannin oligomers, e . g . leuco-fisetinidin form profisetinidin, and flavan-4-ols form condensed tannins, e . g . 3', 4', 5, 7-flavan-4-ol form proluteolinidin ( luteoforolor ).