Nissan Chemical Industries Limited

Norio Hashimoto

Toru Tsukagoshi

Tomoyuki Matsuda

Takayuki Nagatsuka

This invention relates to benzopyran compounds of formula (I) wherein X is NR, Y is a bond, SO or SO, Z is Calkyl group or phenyl group, W is hydrogen atom, hydroxy group, Calkoxy group, a halogen atom, Calkyl group or Calkylsulfonylamino group, Rand Rare independently of each other Calkyl group, Ris hydrogen atom, hydroxy group or methoxy group, m is an integer of 0 to 4, n is an integer of 0 to 4, V is a single bond, CRR, NR, O, S, SO or SO, Ris hydrogen atom or Calkyl group, Ris hydrogen atom, Calkyl group, Ccycloalkyl group, Ccycloalkenyl group, Caryl group or Cheteroaryl group. These compounds are useful as an anti-arrhythmic agent.

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Minamisaitama-gun, Japan

Norio Hashimoto