prov:value
| - According to the present invention there is provided: photosensitive compounds represented by the general formulae (1), (2) or (3): ##STR1## wherein R is H, --X--Rb or ##STR2## X is a single C--C bond, --O--, --S--, --SO2 --, ##STR3## --(CH2)n --, or ##STR4## n is 1 or 2, Ra is H, --OH, --OY, --OZ, halogen or lower alkyl, with at least one Ra radical being --OY and at least one thereof being --OZ,
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