1659
However , despite the four formulations studied did not present any acute phototoxicity potential , the combination 2 containing octyl methoxycinnamate ( OMC ) , avobenzone ( AVB ) and 4 - methylbenzilidene camphor ( MBC ) presented an indication of phototoxicity that should be better investigated in terms of the frequency of photoallergic or chronic phototoxicity in humans , once these tests are scientifically validated only to detect phototoxic potential with the aim of preventing phototoxic reactions in the general population , and positive results cannot predict the exact incidence of phototoxic reactions in humans .
 Chemical: octyl methoxycinnamate; Chemical: OMC; Chemical: avobenzone; Chemical: AVB; Chemical: 4 - methylbenzilidene camphor; Chemical: MBC
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: octyl methoxycinnamate; Chemical: OMC; Chemical: avobenzone; Chemical: AVB; Chemical: 4 - methylbenzilidene camphor; Chemical: MBC