==Structure-6 (19(doc2))==
===[http://v3.espacenet.com/searchResults?locale=en_EP&NUM=US2007100181&ST=number&compact=false&DB=EPODOC US 2007100181]===
[[Image:b3b31.jpg|thumb|center|500px]]
R<sub>1</sub>-R<sub>2</sub>= H, -C<sub>2</sub>H<sub>5 </sub>which matches with R<sup>1</sup>(alkyl) at 1<sup>st</sup> position of pyrazole of generic structure