I want to show visually the similarities between Sildenafil (Viagra) and the molecule on the right:
Is it allowed to flip the skeletal structural formula and rotate bond strings of the molecule on the right to better show the similarities like I did it in the following figure?
The molecule on the right is flipped at the horizontal line and the bottom left C$_2$H$_5$ is rotated outwards. In both cases, the structure is the same, but I stumbled on things like enatiomeres and optical isomerism, and now I'm confused. I red "Graphical representation standards for chemical structure diagrams (IUPAC Recommendations 2008)" partially, which seems to allow transformations like tried above, but as non-chemist, I'm still unsure.