Complete the following reaction sequence,giving details of all significant intermediates. 
Definitions:
Ecological Pyramid
A graphical representation of the relative energy value at each trophic level. See pyramid of biomass and pyramid of energy.
Trophic Levels
The hierarchical levels in an ecosystem, determined by the feeding position of organisms in food chains.
Energy Loss
The reduction in energy as it moves through the trophic levels of an ecosystem; often described in the context of the inefficiency of energy transfer between levels.
Tertiary Consumers
Carnivores that eat secondary consumers; they are often apex predators in their ecosystems.
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