(1R,2R,3S,4R)-2,3-dimethylbicyclo[2.2.1]heptane InChI=1/C9H16/c1-6-7(2)9-4-3-8(6)5-9/h6-9H,3-5H2,1-2H3/t6-,7+,8-,9-/m1/s bicyclo[2.2.1]heptane, 2,3-dimethyl-, (1R,2R,3S,4R)-