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... LOPYR ... (11 elements)

en (6) : CLOPYRALID · CYCLOPYRROLONE · CYCLOPYRRONE · PYRAZOLOPYRIMIDINE · TRICLOPYR · XYLOPYROGRAPHY

es (2) : AUSTRALOPYRUM · HALOPYRUM

fr (1) : CLOPYRALID

pt (2) : COELOPYRENA · HALOPYRUM

... LOPY ... (36 elements)

AUSTRALOPYRUM · CALOPYXIS · CEPHALOPYGE · COELOPYRENA · COLLOPY · HALOPYRUM · JALOPY · NYCTALOPY · PYRAZOLOPYRIMIDINE · SLOPY

... OPYR ... (257 elements)

ALGOPYRIN · FAGOPYRISM · FAGOPYRISME · FAGOPYRUM · GLUCOPYRANOSYL · LEUCOPYRITE · METHYLGLUCOPYRANOSIDES · OLIGOPYRIMIDIQUE · PARACOPYRIGHT · THIOGLUCOPYRANOSIDES

... ALOPYR ... (3 elements)

AUSTRALOPYRUM · HALOPYRUM

... CLOPYR ... (5 elements)

CLOPYRALID · CYCLOPYRROLONE · CYCLOPYRRONE · TRICLOPYR

... ELOPYR ... (1 element)

COELOPYRENA

... LOPYRA ... (2 elements)

CLOPYRALID

... LOPYRE ... (1 element)

COELOPYRENA

... LOPYRI ... (1 element)

PYRAZOLOPYRIMIDINE

... LOPYRO ... (1 element)

XYLOPYROGRAPHY

... LOPYRR ... (2 elements)

CYCLOPYRROLONE · CYCLOPYRRONE

... LOPYRU ... (3 elements)

AUSTRALOPYRUM · HALOPYRUM

... OLOPYR ... (1 element)

PYRAZOLOPYRIMIDINE

... YLOPYR ... (1 element)

XYLOPYROGRAPHY