I'm having trouble drawing the Isocyanurate molecule. The link between nitrogen (N) and carbon (C) on the right side does not link correctly, as per the code - it moves a little inbound to the carbon (C).
Thank you!
\schemestart
\chemfig{R-N=C=O + 2 R-N=C=O} \arrow \\ \chemfig{C(=[3]O)(-[1]N(-[2]R)(-[7]C=[1]O))-[6]N(-[5]R)(-[7]C(=[6]O)(-[1]N([2]-)(-[7]R)))} (Isocianurato)
\schemestop