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/7>propylphenol mellein

Q3. Since insects do not have chorismic acid available, both compounds must be derived from tyrosine.

Q4. It looks very like a polyketide, so one should try incorporating sodium 2-[13C]acetate in the predicted positions without scrambling the label.

Q5. Both homogentisic acid (Figure 8.11) and ^-hydroxybenzaldehyde can be derived from tyrosine. Marginalin is a condensation product of homogentisic acid and /?-hydroxybenzaldehyde.

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