Question

methyl ester of Hardwick acid contain how many Methy groups
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Answer 1

Answer:

4 methyl groups......

methyl ester of Hardwick acid contains....... methyl groups,

Answer 2

There are four methyl groups contain the Hardwick acid.

S. Canadensis provided the clerodane diterpene, kolavenic acid  previously isolated from the roots of S. altissima [19] and the roots of S. sempervirens gave the known diterpene, Hardwick acid (12), found also in S. serotina

Explanation:

The constitution and stereochemistry of five new diterpenoids from Solidago jutzcea Ait., junceic  acid (3a), the related epoxide (6a), junceanol W(4a), junceanol X (4b), and junceanol Y (5a), have  been assigned on the basis of their chemical and spectroscopic properties. Of key importance in these  deductions have been the transformations of 4b and 5a into the previously described hydrocarbon 19  and of 3a into 3e. Two known diterpenoids, (-)-hardwickiic acid (2a), which has also been converted into  3e, and etzt-16-kauren-19-oic acid (I), are further constituents of S. jut~cea