If there are multiple side chains of the same type, use prefixes such as "di-" and "tri-" to indicate it as such, and number each one.
ɪf ðɛɹˌɑːɹ mˌʌltɪpəl sˈaɪd tʃˈeɪnz ʌvðə sˈeɪm tˈaɪp, jˈuːs pɹˈiːfɪksᵻz sˈʌtʃ ɐz "di" ænd "tɹˈaɪ" tʊ ˈɪndᵻkˌeɪt ɪɾ æz sˈʌtʃ, ænd nˈʌmbɚɹ ˈiːtʃ wˌʌn.