penicillin.chem:
.cstart

# Example file for chem:
#    benzylpenicillin or C16_H18_N2_O4_S or
#    (2S,5R,6R)-3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-
#       1-azabicyclo[3.2.0]heptane-2-carboxylic acid (CAS-RN: 61-33-6)
#
# Found at https://en.wikipedia.org/wiki/Benzylpenicillin
#
# Prepared by Bernd Warken <groff-bernd.warken-72@web.de>,
# partial rewrite by Norwid Behrnd <nbehrnd@yahoo.com>.

R1:	ring4 pointing 45 put N at 2
R2:	ring5 pointing right with .V3 at R1.V2 put N at 3 put S at 5

	doublebond -130 at R1.V3 ; O
	frontbond -60 at R1.V4 ; N
B1:	bond -120
	doublebond down ; O
	bond -60 at B1.end
	bond -120
	ring6 double 1,2 3,4 5,6
	H above N

	bond 60 at R2.V1
	bond 120 at R2.V1
	backbond 160 at R2.V2 ; CO2H

# Local Variables:
# mode: Nroff
# End:
.cend