# ddcn examples: 'R220.3 H2793Z H32 c.2', 'BIO JP2 R5c.1'
my (@parts) = m/
- ^([a-zA-Z-]+(?:$possible_decimal)?) # R220.3 # BIO # first example will require extra splitting
+ ^([a-zA-Z-]+[0-9]?-?[a-zA-Z]*(?:$possible_decimal)?) # R220.3 # BIO # first example will require extra splitting
\s*
(.+) # H2793Z H32 c.2 # R5c.1 # everything else (except bracketing spaces)
\s*