Anthocyanidins and deoxyanthocyandins

The heterocycle of anthocyanidins is a pyrilium kation. Anthocyanidins are typically not found as free aglycones, with the excepton of the following widely distributed, colored compounds Pelargonidin (orange-red 1.45), cyanidin (red 1.46), peonidin (rose-red 1.47), delphinidin (blue-violet 1.48), petunidin (blue-purple 1.49), and malvidin (purple 1.50). A convenient mnemonic is PCP-DPM. The most common anthocyanidin is cyanidin. These compounds are present in the vacuoles of colored plant tissues such as leaves or flower petals. The color of the pigment depends on 

Note that each of the six common anthocyanidins has the basic structure of the flavylium cation (2-phenyl benzopyrilium 1.31). 

Other anthocyanidins exist, and can be categorized into two groups  

Those where either the C5 or C7 position is substituted with a methoxyl group 

The deoxyanthocyanidins, which do not contain a hydroxyl group at the C3 position 

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