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rubra_001.seq 

 APPROX PRODUCT CHEMISTRY :    
                                                                                
--Loading-(CH =CR )-(CO -CHR)-(CHO-CHR)-
-----    |  R=CH3  |  R = H  |  R=CH3  |
rubra_002.seq 

 APPROX PRODUCT CHEMISTRY :    
                                                                                
(CH =CR )-(CH =CR )-(CH =CR )-
  R=CH3  |  R=xxx  |  R=xxx  |