| id | Phytocompound | Taste |
| ribose | sweet | |
| roburin A | astringent; bitter | |
| roburin B | astringent; bitter | |
| roburin C | astringent; bitter | |
| roburin D | astringent; bitter | |
| roburin E | astringent; bitter | |
| rodiasine | bitter | |
| rosmarinic acid | bitter; pungent | |
| rubescenamine | umami | |
| rubrumin | astringent; | |
| rubusoside | sweet; bitter | |
| rutaecarpine | bitter (electronic tongue) | |
| rutaevin | bitter | |
| rutin | astringent; bitter; bitter enhancer | |
| S-1-propenyl-L-cysteine sulfoxide | pungency precursor | |
| sabinene | pungent | |
| sakuranetin | bitter masking | |
| salicin | bitter | |
| salicylic acid | sweet; sour; astringent; bitter; acrid | |
| salonitenolide | bitter (insufficient evidence) |
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