prov:value
| - Of particular interest, are spiro(indoline)pyrido benzoxazines represented by graphic formula III wherein R1 is a C1 -C4 alkyl, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, secondary butyl, isobutyl and tertiary butyl; R2 and R3 are each methyl, ethyl or phenyl; and R4 and R5 are each methyl, methoxy, trifluoromethyl, chloro or fluoro.
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