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DE3 patents

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US4664840AMay 12, 1987

Liquid crystal compounds

MERCK E25 citations91
US4116628ASep 26, 1978

Powdery pearlescent pigment composition

MERCK E33 citations88
US4120961AOct 17, 1978

Ring substituted pyrazino-isoquinoline derivatives and their preparation

MERCK E0 citations39