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8 + 11 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Molecular formula for chlorophyll b is:

C55 H70 O5N4 Mg

C55 H72 O5N4 Mg

C55 H70 O6N4 Mg

C56 H70 O6N6 Mg