| http://www.w3.org/ns/prov#value | - Agent: Kelley Drye & Warren LLP20100069374 - Tricyclic benzopyrane compound: wherein R1 and R2 are independently of each other hydrogen atom, C1-6alkyl group or C6-14aryl group, R3 is hydrogen atom or C1-6alkylcarbonyloxy group, or together with R4 forms a bond, R4 is hydrogen atom, or together with R3 forms a bond, m is an integer of 0 to 4, n...
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