prov:value
| - The photosensitive compounds may be represented by general formulae (1), (2) and (3): ##STR25## wherein R Is H, --X--Rb or ##STR26## X is a single C--C bond, --O--, --S--, --SO2 --, ##STR27## --(CH2)n --, or ##STR28## n is 1 or 2, Ra is H, --OH, --OY, --OZ, halogen, preferably Cl or Br, or lower alkyl, preferably lower alkyl having 1-4 carbon atoms, with at least one Ra radical being --OY and at l
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