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In US 7,704,933 B2, claims 1 and 2 are

1. A compound of formula (II):

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wherein the dotted line represents a single or double bond and one R2 is a hydrogen atom and the other is a hydrogen atom or a methyl group.

2. A compound according to claim 1, wherein said compund is of formula (III):

enter image description here

wherein the dotted line represents a single or double bond.

Is claim 2 not completely included in claim 1? Why state claim 2?

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