import re
text = "50. The SBI considered this sub-item at its resumed 1^st^ meeting and at its 2^nd^ meeting (see para. 46 above). It had before it documents FCCC/CP/2011/7 and Corr.1 and Add.1 and 2, FCCC/SBI/2010/17, FCCC/SBI/2010/26 and FCCC/SBI/2010/MISC.9. A statement was made on behalf of the LDCs."
rx_main = re.compile(r'(FCCC/(?:SBSTA|SBI|CP|KP/CMP|PA/CMA)/\d{4}/(?:INF\.|L\.|MISC\.)?\d+)((?:(?:/|\s+and\s+|\s*,\s*)(?:Add|Rev|Corr)\.\d+(?:(?:\s*,\s*|\s+and\s+)\d+)*)*)')
rx_rev = re.compile(r'(?:Add|Rev|Corr)\.\d+(?:(?:\s*,\s*|\s+and\s+)\d+)*')
rx_split = re.compile(r'\s*,\s*|\s+and\s+')
matches = rx_main.finditer(text)
results = []
for m in matches:
	results.append(m.group(1))
	chunks = [rx_split.split(x) for x in rx_rev.findall(m.group(2))]
	for ch in chunks:
		if len(ch) == 1: # it is simple, just add
			results.append(f"{m.group(1)}/{ch[0]}")
		else:
			name = ch[0].split('.')[0] # Rev, Corr or Add
			for c in ch:
				if '.' in c:
					results.append(f"{m.group(1)}/{c}")
				else:
					results.append(f"{m.group(1)}/{name}.{c}")
 
print(results)

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