In contrast , the OMC does not show degradation when kept in darkness for extended periods of time .
This degradation causes formation of the Z - octyl - p - methoxycinnamate from the E-octyl - p - methoxycinnamate .
The OMC does not show degradation when kept in darkness for extended periods of time .
This degradation causes formation of the Z - octyl - p - methoxycinnamate from the E-octyl - p - methoxycinnamate .