Figure 1
Structures of Chls. (a) Stereochemistry and numbering system in monovinyl-Chla.Variations of Chl include (b) Chlb(7-formyl, R = phytyl); and (c) Chl c1(171-dehydro-Pchlide, R1= methyl; R2= ethyl or vinyl; R = H). Pchlide is similar to Chl but contains a saturated propionic rather than acrylic acid group on C17. (Structures as in [49]).