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Table 4 The catalyst reusability for the synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazole]

From: Green synthesis of spiro[indoline-3,4′-pyrano[2,3-c]pyrazoles] using Fe3O4@l-arginine as a robust and reusable catalyst

Cycle First Second Third Fourth Fifth
Yield (%)a 96 94 93 89 88
  1. aYields refer to the isolated pure product