Draw the structures of the following compounds.
3 - methyl butanal
p-nitro propiophenone
p- methyl benzaldehyde
4-methyl pent -3-en-one
4-chloro pentan-2-one
3-bromo-4-phenyl pentanoic acid
p, p' - dihydroxyl benzophenone
Hex-2-en-4-ynoic acid