20641
The incubation of leaves from unstressed plants under high light intensity resulted in an increase of the activity of electron donation by nicotinamide adenine dinucleotide phosphate ( NADPH ) and ferredoxin to plastoquinone , but no increase was observed in plants exposed to water deficit , suggesting that cyclic electron transport was stimulated by high light only in control plants .
 nicotinamide adenine dinucleotide phosphate, NADPH, plastoquinone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 nicotinamide adenine dinucleotide phosphate, NADPH, plastoquinone