Certain naphthofurans and method for their manufacture

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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C07D30792

Patent

active

040575624

ABSTRACT:
The invention relates to specific naphthofurans which are useful as cryochromic substances e.g. for measuring the temperature, pH value or radiation field.

REFERENCES:
patent: 2894003 (1959-07-01), Long et al.

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